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79243381 = 7372711129
BaseRepresentation
bin1001011100100…
…10100001110101
312112002222111001
410232102201311
5130241242011
611510243301
71651362160
oct456224165
9175088431
1079243381
11408047a8
1222656531
1313556b99
14a74aad7
156e547c1
hex4b92875

79243381 has 16 divisors (see below), whose sum is σ = 93437440. Its totient is φ = 65784960.

The previous prime is 79243369. The next prime is 79243421. The reversal of 79243381 is 18334297.

It is a cyclic number.

It is not a de Polignac number, because 79243381 - 27 = 79243253 is a prime.

It is a super-2 number, since 2×792433812 = 12559026864622322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

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 79243381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79243361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69625 + ... + 70753.

It is an arithmetic number, because the mean of its divisors is an integer number (5839840).

Almost surely, 279243381 is an apocalyptic number.

79243381 is the 5140-th hex number.

It is an amenable number.

79243381 is a deficient number, since it is larger than the sum of its proper divisors (14194059).

79243381 is a wasteful number, since it uses less digits than its factorization.

79243381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444.

The product of its digits is 36288, while the sum is 37.

The square root of 79243381 is about 8901.8751395422. The cubic root of 79243381 is about 429.5242276983.

The spelling of 79243381 in words is "seventy-nine million, two hundred forty-three thousand, three hundred eighty-one".

Divisors: 1 7 37 259 271 1129 1897 7903 10027 41773 70189 292411 305959 2141713 11320483 79243381