79942615 has 4 divisors (see below), whose sum is σ = 95931144. Its totient is φ = 63954088.

The previous prime is 79942609. The next prime is 79942627. The reversal of 79942615 is 51624997.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51624997 = 727 ⋅71011.

It is a cyclic number.

It is not a de Polignac number, because 79942615 - 2⁷ = 79942487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7994257 + ... + 7994266.

It is an arithmetic number, because the mean of its divisors is an integer number (23982786).

Almost surely, 2^79942615 is an apocalyptic number.

79942615 is a deficient number, since it is larger than the sum of its proper divisors (15988529).

79942615 is a wasteful number, since it uses less digits than its factorization.

79942615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15988528.

The product of its digits is 136080, while the sum is 43.

The square root of 79942615 is about 8941.0634155004. The cubic root of 79942615 is about 430.7838865002.

It can be divided in two parts, 7994 and 2615, that added together give a square (10609 = 103²).

The spelling of 79942615 in words is "seventy-nine million, nine hundred forty-two thousand, six hundred fifteen".