85637317 has 2 divisors, whose sum is σ = 85637318. Its totient is φ = 85637316.

The previous prime is 85637311. The next prime is 85637327. The reversal of 85637317 is 71373658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77986561 + 7650756 = 8831^2 + 2766^2 .

It is a cyclic number.

It is not a de Polignac number, because 85637317 - 2³ = 85637309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85637317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85637311) 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, 42818658 + 42818659.

It is an arithmetic number, because the mean of its divisors is an integer number (42818659).

Almost surely, 2^85637317 is an apocalyptic number.

It is an amenable number.

85637317 is a deficient number, since it is larger than the sum of its proper divisors (1).

85637317 is an equidigital number, since it uses as much as digits as its factorization.

85637317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 85637317 is about 9254.0432784810. The cubic root of 85637317 is about 440.7791240389.

The spelling of 85637317 in words is "eighty-five million, six hundred thirty-seven thousand, three hundred seventeen".