79521697 has 8 divisors (see below), whose sum is σ = 82429056. Its totient is φ = 76665072.

The previous prime is 79521679. The next prime is 79521709. The reversal of 79521697 is 79612597.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79521697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79521997) 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, 9478 + ... + 15775.

It is an arithmetic number, because the mean of its divisors is an integer number (10303632).

Almost surely, 2^79521697 is an apocalyptic number.

It is an amenable number.

79521697 is a deficient number, since it is larger than the sum of its proper divisors (2907359).

79521697 is a wasteful number, since it uses less digits than its factorization.

79521697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25367.

The product of its digits is 238140, while the sum is 46.

The square root of 79521697 is about 8917.4938744022. The cubic root of 79521697 is about 430.0264937705.

The spelling of 79521697 in words is "seventy-nine million, five hundred twenty-one thousand, six hundred ninety-seven".