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7289680901 = 29376932353
BaseRepresentation
bin1101100100111111…
…11011010000000101
3200211000211011021112
412302133323100011
5104412124242101
63203203054405
7345434156666
oct66237732005
920730734245
107289680901
113100920178
1214b5371405
138c232cb69
144d220536d
152c9e8a6bb
hex1b27fb405

7289680901 has 8 divisors (see below), whose sum is σ = 7324298520. Its totient is φ = 7255130112.

The previous prime is 7289680891. The next prime is 7289680919. The reversal of 7289680901 is 1090869827.

It can be written as a sum of positive squares in 4 ways, for example, as 3949996801 + 3339684100 = 62849^2 + 57790^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7289680901 - 230 = 6215939077 is a prime.

It is a super-3 number, since 3×72896809013 (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7289680901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7289680991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209141 + ... + 241493.

It is an arithmetic number, because the mean of its divisors is an integer number (915537315).

Almost surely, 27289680901 is an apocalyptic number.

It is an amenable number.

7289680901 is a deficient number, since it is larger than the sum of its proper divisors (34617619).

7289680901 is a wasteful number, since it uses less digits than its factorization.

7289680901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33415.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 7289680901 is about 85379.6281380986. The cubic root of 7289680901 is about 1938.9629293420.

The spelling of 7289680901 in words is "seven billion, two hundred eighty-nine million, six hundred eighty thousand, nine hundred one".

Divisors: 1 293 769 32353 225317 9479429 24879457 7289680901