90002031 has 16 divisors (see below), whose sum is σ = 144364800. Its totient is φ = 48722688.

The previous prime is 90001999. The next prime is 90002041. The reversal of 90002031 is 13020009.

It is not a de Polignac number, because 90002031 - 2⁵ = 90001999 is a prime.

It is a super-2 number, since 2×90002031² = 16200731168249922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90002031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90002041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112386 + ... + 113183.

It is an arithmetic number, because the mean of its divisors is an integer number (9022800).

Almost surely, 2^90002031 is an apocalyptic number.

90002031 is a deficient number, since it is larger than the sum of its proper divisors (54362769).

90002031 is a wasteful number, since it uses less digits than its factorization.

90002031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225598.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 90002031 is about 9486.9400230000. The cubic root of 90002031 is about 448.1438456426.

The spelling of 90002031 in words is "ninety million, two thousand, thirty-one".