79213457 has 4 divisors (see below), whose sum is σ = 80167920. Its totient is φ = 78258996.

The previous prime is 79213447. The next prime is 79213469. The reversal of 79213457 is 75431297.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75431297 = 6317 ⋅11941.

It is a cyclic number.

It is not a de Polignac number, because 79213457 - 2¹⁰ = 79212433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79213457.

It is not an unprimeable number, because it can be changed into a prime (79213427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477107 + ... + 477272.

It is an arithmetic number, because the mean of its divisors is an integer number (20041980).

Almost surely, 2^79213457 is an apocalyptic number.

It is an amenable number.

79213457 is a deficient number, since it is larger than the sum of its proper divisors (954463).

79213457 is an equidigital number, since it uses as much as digits as its factorization.

79213457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954462.

The product of its digits is 52920, while the sum is 38.

The square root of 79213457 is about 8900.1942113642. The cubic root of 79213457 is about 429.4701550382.

The spelling of 79213457 in words is "seventy-nine million, two hundred thirteen thousand, four hundred fifty-seven".