86918317 has 2 divisors, whose sum is σ = 86918318. Its totient is φ = 86918316.

The previous prime is 86918309. The next prime is 86918333. The reversal of 86918317 is 71381968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62504836 + 24413481 = 7906^2 + 4941^2 .

It is a cyclic number.

It is not a de Polignac number, because 86918317 - 2³ = 86918309 is a prime.

It is a super-2 number, since 2×86918317² = 15109587660224978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86918917) 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, 43459158 + 43459159.

It is an arithmetic number, because the mean of its divisors is an integer number (43459159).

Almost surely, 2^86918317 is an apocalyptic number.

It is an amenable number.

86918317 is a deficient number, since it is larger than the sum of its proper divisors (1).

86918317 is an equidigital number, since it uses as much as digits as its factorization.

86918317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 86918317 is about 9322.9993564303. Note that the first 3 decimals coincide. The cubic root of 86918317 is about 442.9660439334.

The spelling of 86918317 in words is "eighty-six million, nine hundred eighteen thousand, three hundred seventeen".