86663917 has 2 divisors, whose sum is σ = 86663918. Its totient is φ = 86663916.

The previous prime is 86663893. The next prime is 86663933. The reversal of 86663917 is 71936668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44009956 + 42653961 = 6634^2 + 6531^2 .

It is a cyclic number.

It is not a de Polignac number, because 86663917 - 2⁷ = 86663789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86663987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43331958 + 43331959.

It is an arithmetic number, because the mean of its divisors is an integer number (43331959).

Almost surely, 2^86663917 is an apocalyptic number.

It is an amenable number.

86663917 is a deficient number, since it is larger than the sum of its proper divisors (1).

86663917 is an equidigital number, since it uses as much as digits as its factorization.

86663917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 86663917 is about 9309.3456805513. The cubic root of 86663917 is about 442.5334512467.

The spelling of 86663917 in words is "eighty-six million, six hundred sixty-three thousand, nine hundred seventeen".