90631015 has 4 divisors (see below), whose sum is σ = 108757224. Its totient is φ = 72504808.

The previous prime is 90631001. The next prime is 90631027. The reversal of 90631015 is 51013609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90631015 - 2⁵ = 90630983 is a prime.

It is a super-3 number, since 3×90631015³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9063097 + ... + 9063106.

It is an arithmetic number, because the mean of its divisors is an integer number (27189306).

Almost surely, 2^90631015 is an apocalyptic number.

90631015 is a deficient number, since it is larger than the sum of its proper divisors (18126209).

90631015 is a wasteful number, since it uses less digits than its factorization.

90631015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18126208.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 90631015 is about 9520.0323003654. The cubic root of 90631015 is about 449.1853821854.

The spelling of 90631015 in words is "ninety million, six hundred thirty-one thousand, fifteen".