82977931 has 2 divisors, whose sum is σ = 82977932. Its totient is φ = 82977930.

The previous prime is 82977929. The next prime is 82977941. The reversal of 82977931 is 13977928.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82977931 - 2¹ = 82977929 is a prime.

It is a super-2 number, since 2×82977931² = 13770674066081522, which contains 22 as substring.

Together with 82977929, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (82977941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41488965 + 41488966.

It is an arithmetic number, because the mean of its divisors is an integer number (41488966).

Almost surely, 2^82977931 is an apocalyptic number.

82977931 is a deficient number, since it is larger than the sum of its proper divisors (1).

82977931 is an equidigital number, since it uses as much as digits as its factorization.

82977931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 82977931 is about 9109.2223048952. Note that the first 3 decimals coincide. The cubic root of 82977931 is about 436.1684024583.

The spelling of 82977931 in words is "eighty-two million, nine hundred seventy-seven thousand, nine hundred thirty-one".