86366491 has 2 divisors, whose sum is σ = 86366492. Its totient is φ = 86366490.

The previous prime is 86366479. The next prime is 86366507. The reversal of 86366491 is 19466368.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86366491 is a prime.

It is not a weakly prime, because it can be changed into another prime (86366431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43183245 + 43183246.

It is an arithmetic number, because the mean of its divisors is an integer number (43183246).

Almost surely, 2^86366491 is an apocalyptic number.

86366491 is a deficient number, since it is larger than the sum of its proper divisors (1).

86366491 is an equidigital number, since it uses as much as digits as its factorization.

86366491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 43.

The square root of 86366491 is about 9293.3573588881. The cubic root of 86366491 is about 442.0266204970.

The spelling of 86366491 in words is "eighty-six million, three hundred sixty-six thousand, four hundred ninety-one".