85690037 has 2 divisors, whose sum is σ = 85690038. Its totient is φ = 85690036.

The previous prime is 85690021. The next prime is 85690063. The reversal of 85690037 is 73009658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82337476 + 3352561 = 9074^2 + 1831^2 .

It is a cyclic number.

It is not a de Polignac number, because 85690037 - 2⁴ = 85690021 is a prime.

It is a super-2 number, since 2×85690037² = 14685564882122738, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85690067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42845018 + 42845019.

It is an arithmetic number, because the mean of its divisors is an integer number (42845019).

Almost surely, 2^85690037 is an apocalyptic number.

It is an amenable number.

85690037 is a deficient number, since it is larger than the sum of its proper divisors (1).

85690037 is an equidigital number, since it uses as much as digits as its factorization.

85690037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 85690037 is about 9256.8913248455. The cubic root of 85690037 is about 440.8695562216.

The spelling of 85690037 in words is "eighty-five million, six hundred ninety thousand, thirty-seven".