79220957 has 4 divisors (see below), whose sum is σ = 79570176. Its totient is φ = 78871740.

The previous prime is 79220929. The next prime is 79220971. The reversal of 79220957 is 75902297.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75902297 = 17 ⋅4464841.

It is a cyclic number.

It is not a de Polignac number, because 79220957 - 2¹² = 79216861 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 (79220917) 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, 174269 + ... + 174722.

It is an arithmetic number, because the mean of its divisors is an integer number (19892544).

Almost surely, 2^79220957 is an apocalyptic number.

It is an amenable number.

79220957 is a deficient number, since it is larger than the sum of its proper divisors (349219).

79220957 is a wasteful number, since it uses less digits than its factorization.

79220957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349218.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 79220957 is about 8900.6155405118. The cubic root of 79220957 is about 429.4837088149.

The spelling of 79220957 in words is "seventy-nine million, two hundred twenty thousand, nine hundred fifty-seven".