86939218057 has 2 divisors, whose sum is σ = 86939218058. Its totient is φ = 86939218056.

The previous prime is 86939218027. The next prime is 86939218111. The reversal of 86939218057 is 75081293968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83484012096 + 3455205961 = 288936^2 + 58781^2 .

It is a cyclic number.

It is not a de Polignac number, because 86939218057 - 2⁷ = 86939217929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86939217992 and 86939218010.

It is not a weakly prime, because it can be changed into another prime (86939218027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43469609028 + 43469609029.

It is an arithmetic number, because the mean of its divisors is an integer number (43469609029).

Almost surely, 2^86939218057 is an apocalyptic number.

It is an amenable number.

86939218057 is a deficient number, since it is larger than the sum of its proper divisors (1).

86939218057 is an equidigital number, since it uses as much as digits as its factorization.

86939218057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 86939218057 in words is "eighty-six billion, nine hundred thirty-nine million, two hundred eighteen thousand, fifty-seven".