79877897 has 4 divisors (see below), whose sum is σ = 87139536. Its totient is φ = 72616260.

The previous prime is 79877893. The next prime is 79877921.

79877897 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 79877897 - 2² = 79877893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79877891) 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, 3630803 + ... + 3630824.

It is an arithmetic number, because the mean of its divisors is an integer number (21784884).

Almost surely, 2^79877897 is an apocalyptic number.

It is an amenable number.

79877897 is a deficient number, since it is larger than the sum of its proper divisors (7261639).

79877897 is a wasteful number, since it uses less digits than its factorization.

79877897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7261638.

The product of its digits is 12446784, while the sum is 62.

The square root of 79877897 is about 8937.4435382832. The cubic root of 79877897 is about 430.6676072654.

The spelling of 79877897 in words is "seventy-nine million, eight hundred seventy-seven thousand, eight hundred ninety-seven".