90685237 has 8 divisors (see below), whose sum is σ = 94182176. Its totient is φ = 87251472.

The previous prime is 90685229. The next prime is 90685267. The reversal of 90685237 is 73258609.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90685237 - 2³ = 90685229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90685237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90685267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12858 + ... + 18619.

It is an arithmetic number, because the mean of its divisors is an integer number (11772772).

Almost surely, 2^90685237 is an apocalyptic number.

It is an amenable number.

90685237 is a deficient number, since it is larger than the sum of its proper divisors (3496939).

90685237 is a wasteful number, since it uses less digits than its factorization.

90685237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31587.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 90685237 is about 9522.8796590107. The cubic root of 90685237 is about 449.2749426752.

The spelling of 90685237 in words is "ninety million, six hundred eighty-five thousand, two hundred thirty-seven".