79957637 has 4 divisors (see below), whose sum is σ = 83434080. Its totient is φ = 76481196.

The previous prime is 79957627. The next prime is 79957639. The reversal of 79957637 is 73675997.

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: 73675997 = 137 ⋅537781.

It is a cyclic number.

It is not a de Polignac number, because 79957637 - 2⁴ = 79957621 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 (79957639) 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, 1738187 + ... + 1738232.

It is an arithmetic number, because the mean of its divisors is an integer number (20858520).

Almost surely, 2^79957637 is an apocalyptic number.

It is an amenable number.

79957637 is a deficient number, since it is larger than the sum of its proper divisors (3476443).

79957637 is a wasteful number, since it uses less digits than its factorization.

79957637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476442.

The product of its digits is 2500470, while the sum is 53.

The square root of 79957637 is about 8941.9034327150. The cubic root of 79957637 is about 430.8108676468.

The spelling of 79957637 in words is "seventy-nine million, nine hundred fifty-seven thousand, six hundred thirty-seven".