86909361997 has 2 divisors, whose sum is σ = 86909361998. Its totient is φ = 86909361996.

The previous prime is 86909361971. The next prime is 86909362027. The reversal of 86909361997 is 79916390968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68340939241 + 18568422756 = 261421^2 + 136266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86909361997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86909331997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43454680998 + 43454680999.

It is an arithmetic number, because the mean of its divisors is an integer number (43454680999).

Almost surely, 2^86909361997 is an apocalyptic number.

It is an amenable number.

86909361997 is a deficient number, since it is larger than the sum of its proper divisors (1).

86909361997 is an equidigital number, since it uses as much as digits as its factorization.

86909361997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39680928, while the sum is 67.

The spelling of 86909361997 in words is "eighty-six billion, nine hundred nine million, three hundred sixty-one thousand, nine hundred ninety-seven".