86509373 has 2 divisors, whose sum is σ = 86509374. Its totient is φ = 86509372.

The previous prime is 86509363. The next prime is 86509459. The reversal of 86509373 is 37390568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84143929 + 2365444 = 9173^2 + 1538^2 .

It is a cyclic number.

It is not a de Polignac number, because 86509373 - 2⁶ = 86509309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86509373.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86509333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43254686 + 43254687.

It is an arithmetic number, because the mean of its divisors is an integer number (43254687).

Almost surely, 2^86509373 is an apocalyptic number.

It is an amenable number.

86509373 is a deficient number, since it is larger than the sum of its proper divisors (1).

86509373 is an equidigital number, since it uses as much as digits as its factorization.

86509373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 86509373 is about 9301.0415008213. The cubic root of 86509373 is about 442.2702445004.

The spelling of 86509373 in words is "eighty-six million, five hundred nine thousand, three hundred seventy-three".