82163657 has 8 divisors (see below), whose sum is σ = 86652960. Its totient is φ = 77690880.

The previous prime is 82163651. The next prime is 82163663. The reversal of 82163657 is 75636128.

It is an interprime number because it is at equal distance from previous prime (82163651) and next prime (82163663).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82163657 - 2²⁰ = 81115081 is a prime.

It is a super-2 number, since 2×82163657² = 13501733063227298, which contains 22 as substring.

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 82163657.

It is not an unprimeable number, because it can be changed into a prime (82163651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6857 + ... + 14537.

It is an arithmetic number, because the mean of its divisors is an integer number (10831620).

Almost surely, 2^82163657 is an apocalyptic number.

It is an amenable number.

82163657 is a deficient number, since it is larger than the sum of its proper divisors (4489303).

82163657 is a wasteful number, since it uses less digits than its factorization.

82163657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8263.

The product of its digits is 60480, while the sum is 38.

The square root of 82163657 is about 9064.4170799892. The cubic root of 82163657 is about 434.7369828527.

The spelling of 82163657 in words is "eighty-two million, one hundred sixty-three thousand, six hundred fifty-seven".