82587931 has 2 divisors, whose sum is σ = 82587932. Its totient is φ = 82587930.

The previous prime is 82587919. The next prime is 82587949. The reversal of 82587931 is 13978528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82587931 - 2¹¹ = 82585883 is a prime.

It is a super-2 number, since 2×82587931² = 13641532693721522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82587431) 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 as a sum of consecutive naturals, namely, 41293965 + 41293966.

It is an arithmetic number, because the mean of its divisors is an integer number (41293966).

Almost surely, 2^82587931 is an apocalyptic number.

82587931 is a deficient number, since it is larger than the sum of its proper divisors (1).

82587931 is an equidigital number, since it uses as much as digits as its factorization.

82587931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 82587931 is about 9087.7902154484. The cubic root of 82587931 is about 435.4839920599.

The spelling of 82587931 in words is "eighty-two million, five hundred eighty-seven thousand, nine hundred thirty-one".