79977475 has 6 divisors (see below), whose sum is σ = 99172100. Its totient is φ = 63981960.

The previous prime is 79977473. The next prime is 79977487. The reversal of 79977475 is 57477997.

It is not a de Polignac number, because 79977475 - 2¹ = 79977473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79977473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1599525 + ... + 1599574.

Almost surely, 2^79977475 is an apocalyptic number.

79977475 is a deficient number, since it is larger than the sum of its proper divisors (19194625).

79977475 is a wasteful number, since it uses less digits than its factorization.

79977475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199109 (or 3199104 counting only the distinct ones).

The product of its digits is 3889620, while the sum is 55.

The square root of 79977475 is about 8943.0126355720. The cubic root of 79977475 is about 430.8464936758.

The spelling of 79977475 in words is "seventy-nine million, nine hundred seventy-seven thousand, four hundred seventy-five".