79458891 has 4 divisors (see below), whose sum is σ = 105945192. Its totient is φ = 52972592.

The previous prime is 79458889. The next prime is 79458913. The reversal of 79458891 is 19885497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19885497 = 3 ⋅6628499.

It is a cyclic number.

It is not a de Polignac number, because 79458891 - 2¹ = 79458889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79458881) 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, 13243146 + ... + 13243151.

It is an arithmetic number, because the mean of its divisors is an integer number (26486298).

Almost surely, 2^79458891 is an apocalyptic number.

79458891 is a deficient number, since it is larger than the sum of its proper divisors (26486301).

79458891 is a wasteful number, since it uses less digits than its factorization.

79458891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26486300.

The product of its digits is 725760, while the sum is 51.

The square root of 79458891 is about 8913.9716737266. The cubic root of 79458891 is about 429.9132527371.

It can be divided in two parts, 7945 and 8891, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 79458891 in words is "seventy-nine million, four hundred fifty-eight thousand, eight hundred ninety-one".