90393251 has 16 divisors (see below), whose sum is σ = 100531200. Its totient is φ = 80755488.

The previous prime is 90393239. The next prime is 90393269. The reversal of 90393251 is 15239309.

It is a cyclic number.

It is not a de Polignac number, because 90393251 - 2²² = 86198947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90393211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50510 + ... + 52268.

It is an arithmetic number, because the mean of its divisors is an integer number (6283200).

Almost surely, 2^90393251 is an apocalyptic number.

90393251 is a deficient number, since it is larger than the sum of its proper divisors (10137949).

90393251 is a wasteful number, since it uses less digits than its factorization.

90393251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 90393251 is about 9507.5365368743. The cubic root of 90393251 is about 448.7922362566.

The spelling of 90393251 in words is "ninety million, three hundred ninety-three thousand, two hundred fifty-one".