76981937 has 2 divisors, whose sum is σ = 76981938. Its totient is φ = 76981936.

The previous prime is 76981913. The next prime is 76981973. The reversal of 76981937 is 73918967.

Together with next prime (76981973) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52765696 + 24216241 = 7264^2 + 4921^2 .

It is an emirp because it is prime and its reverse (73918967) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76981937 - 2¹⁶ = 76916401 is a prime.

It is not a weakly prime, because it can be changed into another prime (76981337) 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, 38490968 + 38490969.

It is an arithmetic number, because the mean of its divisors is an integer number (38490969).

Almost surely, 2^76981937 is an apocalyptic number.

It is an amenable number.

76981937 is a deficient number, since it is larger than the sum of its proper divisors (1).

76981937 is an equidigital number, since it uses as much as digits as its factorization.

76981937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 50.

The square root of 76981937 is about 8773.9350920781. The cubic root of 76981937 is about 425.3988173308.

The spelling of 76981937 in words is "seventy-six million, nine hundred eighty-one thousand, nine hundred thirty-seven".