85885637 has 2 divisors, whose sum is σ = 85885638. Its totient is φ = 85885636.

The previous prime is 85885627. The next prime is 85885669. The reversal of 85885637 is 73658858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71132356 + 14753281 = 8434^2 + 3841^2 .

It is a cyclic number.

It is not a de Polignac number, because 85885637 - 2⁶ = 85885573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85885607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42942818 + 42942819.

It is an arithmetic number, because the mean of its divisors is an integer number (42942819).

Almost surely, 2^85885637 is an apocalyptic number.

It is an amenable number.

85885637 is a deficient number, since it is larger than the sum of its proper divisors (1).

85885637 is an equidigital number, since it uses as much as digits as its factorization.

85885637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 50.

The square root of 85885637 is about 9267.4504045072. The cubic root of 85885637 is about 441.2047509822.

The spelling of 85885637 in words is "eighty-five million, eight hundred eighty-five thousand, six hundred thirty-seven".