85168637 has 2 divisors, whose sum is σ = 85168638. Its totient is φ = 85168636.

The previous prime is 85168579. The next prime is 85168649. The reversal of 85168637 is 73686158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81252196 + 3916441 = 9014^2 + 1979^2 .

It is a cyclic number.

It is not a de Polignac number, because 85168637 - 2¹⁴ = 85152253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85165637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42584318 + 42584319.

It is an arithmetic number, because the mean of its divisors is an integer number (42584319).

Almost surely, 2^85168637 is an apocalyptic number.

It is an amenable number.

85168637 is a deficient number, since it is larger than the sum of its proper divisors (1).

85168637 is an equidigital number, since it uses as much as digits as its factorization.

85168637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 85168637 is about 9228.6855510414. The cubic root of 85168637 is about 439.9735469634.

The spelling of 85168637 in words is "eighty-five million, one hundred sixty-eight thousand, six hundred thirty-seven".