82179957 has 4 divisors (see below), whose sum is σ = 109573280. Its totient is φ = 54786636.

The previous prime is 82179953. The next prime is 82179967. The reversal of 82179957 is 75997128.

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 not a de Polignac number, because 82179957 - 2² = 82179953 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 (82179953) 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, 13696657 + ... + 13696662.

It is an arithmetic number, because the mean of its divisors is an integer number (27393320).

Almost surely, 2^82179957 is an apocalyptic number.

It is an amenable number.

82179957 is a deficient number, since it is larger than the sum of its proper divisors (27393323).

82179957 is a wasteful number, since it uses less digits than its factorization.

82179957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27393322.

The product of its digits is 317520, while the sum is 48.

The square root of 82179957 is about 9065.3161555458. The cubic root of 82179957 is about 434.7657293185.

The spelling of 82179957 in words is "eighty-two million, one hundred seventy-nine thousand, nine hundred fifty-seven".