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83080681 = 101822581
BaseRepresentation
bin1001111001110…
…11010111101001
312210022221021021
410330323113221
5132232040211
612124412441
72026113505
oct474732751
9183287237
1083080681
1142995822
12239a7121
131429b688
14b069305
157461771
hex4f3b5e9

83080681 has 4 divisors (see below), whose sum is σ = 83903364. Its totient is φ = 82258000.

The previous prime is 83080667. The next prime is 83080691. The reversal of 83080681 is 18608038.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58982400 + 24098281 = 7680^2 + 4909^2 .

It is a cyclic number.

It is not a de Polignac number, because 83080681 - 27 = 83080553 is a prime.

It is a super-2 number, since 2×830806812 = 13804799110847522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83080691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411190 + ... + 411391.

It is an arithmetic number, because the mean of its divisors is an integer number (20975841).

Almost surely, 283080681 is an apocalyptic number.

It is an amenable number.

83080681 is a deficient number, since it is larger than the sum of its proper divisors (822683).

83080681 is a wasteful number, since it uses less digits than its factorization.

83080681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822682.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 83080681 is about 9114.8604487397. The cubic root of 83080681 is about 436.3483612222.

The spelling of 83080681 in words is "eighty-three million, eighty thousand, six hundred eighty-one".

Divisors: 1 101 822581 83080681