82879797 has 72 divisors (see below), whose sum is σ = 151096512. Its totient is φ = 39536640.

The previous prime is 82879781. The next prime is 82879859. The reversal of 82879797 is 79797828.

It is not a de Polignac number, because 82879797 - 2⁴ = 82879781 is a prime.

It is a super-2 number, since 2×82879797² = 13738121501522418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82879717) 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 71 ways as a sum of consecutive naturals, for example, 429333 + ... + 429525.

Almost surely, 2^82879797 is an apocalyptic number.

It is an amenable number.

82879797 is a deficient number, since it is larger than the sum of its proper divisors (68216715).

82879797 is a wasteful number, since it uses less digits than its factorization.

82879797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 227 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 57.

The square root of 82879797 is about 9103.8341922511. The cubic root of 82879797 is about 435.9963895136.

The spelling of 82879797 in words is "eighty-two million, eight hundred seventy-nine thousand, seven hundred ninety-seven".