79037681 has 8 divisors (see below), whose sum is σ = 80778600. Its totient is φ = 77306112.

The previous prime is 79037677. The next prime is 79037711. The reversal of 79037681 is 18673097.

It can be written as a sum of positive squares in 4 ways, for example, as 18835600 + 60202081 = 4340^2 + 7759^2 .

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 79037681 - 2² = 79037677 is a prime.

It is a super-2 number, since 2×79037681² = 12493910035715522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79031681) 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, 16361 + ... + 20633.

It is an arithmetic number, because the mean of its divisors is an integer number (10097325).

Almost surely, 2^79037681 is an apocalyptic number.

It is an amenable number.

79037681 is a deficient number, since it is larger than the sum of its proper divisors (1740919).

79037681 is a wasteful number, since it uses less digits than its factorization.

79037681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4675.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 79037681 is about 8890.3138864722. The cubic root of 79037681 is about 429.1522526008.

The spelling of 79037681 in words is "seventy-nine million, thirty-seven thousand, six hundred eighty-one".