79421597 has 4 divisors (see below), whose sum is σ = 81983616. Its totient is φ = 76859580.

The previous prime is 79421593. The next prime is 79421669. The reversal of 79421597 is 79512497.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79421597 - 2² = 79421593 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79421593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280963 + ... + 1281024.

It is an arithmetic number, because the mean of its divisors is an integer number (20495904).

Almost surely, 2^79421597 is an apocalyptic number.

It is an amenable number.

79421597 is a deficient number, since it is larger than the sum of its proper divisors (2562019).

79421597 is a wasteful number, since it uses less digits than its factorization.

79421597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562018.

The product of its digits is 158760, while the sum is 44.

The square root of 79421597 is about 8911.8795436204. The cubic root of 79421597 is about 429.8459823382.

The spelling of 79421597 in words is "seventy-nine million, four hundred twenty-one thousand, five hundred ninety-seven".