86643317 has 2 divisors, whose sum is σ = 86643318. Its totient is φ = 86643316.

The previous prime is 86643313. The next prime is 86643341. The reversal of 86643317 is 71334668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80120401 + 6522916 = 8951^2 + 2554^2 .

It is a cyclic number.

It is not a de Polignac number, because 86643317 - 2² = 86643313 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86643313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43321658 + 43321659.

It is an arithmetic number, because the mean of its divisors is an integer number (43321659).

Almost surely, 2^86643317 is an apocalyptic number.

It is an amenable number.

86643317 is a deficient number, since it is larger than the sum of its proper divisors (1).

86643317 is an equidigital number, since it uses as much as digits as its factorization.

86643317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 86643317 is about 9308.2391997628. The cubic root of 86643317 is about 442.4983850899.

The spelling of 86643317 in words is "eighty-six million, six hundred forty-three thousand, three hundred seventeen".