79128867 has 4 divisors (see below), whose sum is σ = 105505160. Its totient is φ = 52752576.

The previous prime is 79128857. The next prime is 79128869. The reversal of 79128867 is 76882197.

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

It is not a de Polignac number, because 79128867 - 2⁴ = 79128851 is a prime.

It is a super-2 number, since 2×79128867² = 12522755185407378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79128869) 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, 13188142 + ... + 13188147.

It is an arithmetic number, because the mean of its divisors is an integer number (26376290).

Almost surely, 2^79128867 is an apocalyptic number.

79128867 is a deficient number, since it is larger than the sum of its proper divisors (26376293).

79128867 is a wasteful number, since it uses less digits than its factorization.

79128867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26376292.

The product of its digits is 338688, while the sum is 48.

The square root of 79128867 is about 8895.4407985215. The cubic root of 79128867 is about 429.3172272361.

The spelling of 79128867 in words is "seventy-nine million, one hundred twenty-eight thousand, eight hundred sixty-seven".