82868139 has 12 divisors (see below), whose sum is σ = 125998600. Its totient is φ = 52337664.

The previous prime is 82868131. The next prime is 82868141. The reversal of 82868139 is 93186828.

It is not a de Polignac number, because 82868139 - 2³ = 82868131 is a prime.

It is a super-2 number, since 2×82868139² = 13734256922646642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82868094 and 82868103.

It is not an unprimeable number, because it can be changed into a prime (82868131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242134 + ... + 242475.

Almost surely, 2^82868139 is an apocalyptic number.

82868139 is a deficient number, since it is larger than the sum of its proper divisors (43130461).

82868139 is a wasteful number, since it uses less digits than its factorization.

82868139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484634 (or 484631 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 82868139 is about 9103.1938900586. The cubic root of 82868139 is about 435.9759459137.

The spelling of 82868139 in words is "eighty-two million, eight hundred sixty-eight thousand, one hundred thirty-nine".