79999415 has 4 divisors (see below), whose sum is σ = 95999304. Its totient is φ = 63999528.

The previous prime is 79999411. The next prime is 79999477. The reversal of 79999415 is 51499997.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79999415 - 2² = 79999411 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 (79999411) 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, 7999937 + ... + 7999946.

It is an arithmetic number, because the mean of its divisors is an integer number (23999826).

Almost surely, 2^79999415 is an apocalyptic number.

79999415 is a deficient number, since it is larger than the sum of its proper divisors (15999889).

79999415 is a wasteful number, since it uses less digits than its factorization.

79999415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15999888.

The product of its digits is 918540, while the sum is 53.

The square root of 79999415 is about 8944.2392074452. The cubic root of 79999415 is about 430.8858877169.

The spelling of 79999415 in words is "seventy-nine million, nine hundred ninety-nine thousand, four hundred fifteen".