86708957 has 2 divisors, whose sum is σ = 86708958. Its totient is φ = 86708956.

The previous prime is 86708933. The next prime is 86708971. The reversal of 86708957 is 75980768.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62315236 + 24393721 = 7894^2 + 4939^2 .

It is a cyclic number.

It is not a de Polignac number, because 86708957 - 2²⁰ = 85660381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86708257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43354478 + 43354479.

It is an arithmetic number, because the mean of its divisors is an integer number (43354479).

Almost surely, 2^86708957 is an apocalyptic number.

It is an amenable number.

86708957 is a deficient number, since it is larger than the sum of its proper divisors (1).

86708957 is an equidigital number, since it uses as much as digits as its factorization.

86708957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 86708957 is about 9311.7644407491. The cubic root of 86708957 is about 442.6101008122.

The spelling of 86708957 in words is "eighty-six million, seven hundred eight thousand, nine hundred fifty-seven".