86518973 has 2 divisors, whose sum is σ = 86518974. Its totient is φ = 86518972.

The previous prime is 86518931. The next prime is 86518997. The reversal of 86518973 is 37981568.

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., 67535524 + 18983449 = 8218^2 + 4357^2 .

It is a cyclic number.

It is not a de Polignac number, because 86518973 - 2²⁴ = 69741757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86518273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43259486 + 43259487.

It is an arithmetic number, because the mean of its divisors is an integer number (43259487).

Almost surely, 2^86518973 is an apocalyptic number.

It is an amenable number.

86518973 is a deficient number, since it is larger than the sum of its proper divisors (1).

86518973 is an equidigital number, since it uses as much as digits as its factorization.

86518973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 86518973 is about 9301.5575577427. The cubic root of 86518973 is about 442.2866035651.

The spelling of 86518973 in words is "eighty-six million, five hundred eighteen thousand, nine hundred seventy-three".