86684957 has 2 divisors, whose sum is σ = 86684958. Its totient is φ = 86684956.

The previous prime is 86684879. The next prime is 86684963. The reversal of 86684957 is 75948668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43375396 + 43309561 = 6586^2 + 6581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86684957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86684899 and 86684908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86684357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43342478 + 43342479.

It is an arithmetic number, because the mean of its divisors is an integer number (43342479).

Almost surely, 2^86684957 is an apocalyptic number.

It is an amenable number.

86684957 is a deficient number, since it is larger than the sum of its proper divisors (1).

86684957 is an equidigital number, since it uses as much as digits as its factorization.

86684957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The square root of 86684957 is about 9310.4756591702. The cubic root of 86684957 is about 442.5692606537.

The spelling of 86684957 in words is "eighty-six million, six hundred eighty-four thousand, nine hundred fifty-seven".