79875997 has 4 divisors (see below), whose sum is σ = 80164636. Its totient is φ = 79587360.

The previous prime is 79875989. The next prime is 79876037. The reversal of 79875997 is 79957897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79957897 = 31 ⋅2579287.

It can be written as a sum of positive squares in 2 ways, for example, as 45077796 + 34798201 = 6714^2 + 5899^2 .

It is a cyclic number.

It is not a de Polignac number, because 79875997 - 2³ = 79875989 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 (79875907) 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, 143904 + ... + 144457.

It is an arithmetic number, because the mean of its divisors is an integer number (20041159).

Almost surely, 2^79875997 is an apocalyptic number.

It is an amenable number.

79875997 is a deficient number, since it is larger than the sum of its proper divisors (288639).

79875997 is a wasteful number, since it uses less digits than its factorization.

79875997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288638.

The product of its digits is 10001880, while the sum is 61.

The square root of 79875997 is about 8937.3372432733. The cubic root of 79875997 is about 430.6641925747.

The spelling of 79875997 in words is "seventy-nine million, eight hundred seventy-five thousand, nine hundred ninety-seven".