86731937 has 2 divisors, whose sum is σ = 86731938. Its totient is φ = 86731936.

The previous prime is 86731927. The next prime is 86731949. The reversal of 86731937 is 73913768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73547776 + 13184161 = 8576^2 + 3631^2 .

It is a cyclic number.

It is not a de Polignac number, because 86731937 - 2⁴ = 86731921 is a prime.

It is not a weakly prime, because it can be changed into another prime (86731927) 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, 43365968 + 43365969.

It is an arithmetic number, because the mean of its divisors is an integer number (43365969).

Almost surely, 2^86731937 is an apocalyptic number.

It is an amenable number.

86731937 is a deficient number, since it is larger than the sum of its proper divisors (1).

86731937 is an equidigital number, since it uses as much as digits as its factorization.

86731937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 86731937 is about 9312.9982819713. The cubic root of 86731937 is about 442.6491982021.

The spelling of 86731937 in words is "eighty-six million, seven hundred thirty-one thousand, nine hundred thirty-seven".