86408215237 has 2 divisors, whose sum is σ = 86408215238. Its totient is φ = 86408215236.

The previous prime is 86408215189. The next prime is 86408215249. The reversal of 86408215237 is 73251280468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44356150881 + 42052064356 = 210609^2 + 205066^2 .

It is a cyclic number.

It is not a de Polignac number, because 86408215237 - 2⁷ = 86408215109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86408215277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43204107618 + 43204107619.

It is an arithmetic number, because the mean of its divisors is an integer number (43204107619).

Almost surely, 2^86408215237 is an apocalyptic number.

It is an amenable number.

86408215237 is a deficient number, since it is larger than the sum of its proper divisors (1).

86408215237 is an equidigital number, since it uses as much as digits as its factorization.

86408215237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 86408215237 in words is "eighty-six billion, four hundred eight million, two hundred fifteen thousand, two hundred thirty-seven".