90503381 has 4 divisors (see below), whose sum is σ = 90609600. Its totient is φ = 90397164.

The previous prime is 90503377. The next prime is 90503389. The reversal of 90503381 is 18330509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90503381 - 2² = 90503377 is a prime.

It is a super-2 number, since 2×90503381² = 16381723944862322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90503389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51821 + ... + 53538.

It is an arithmetic number, because the mean of its divisors is an integer number (22652400).

Almost surely, 2^90503381 is an apocalyptic number.

It is an amenable number.

90503381 is a deficient number, since it is larger than the sum of its proper divisors (106219).

90503381 is a wasteful number, since it uses less digits than its factorization.

90503381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106218.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 90503381 is about 9513.3264949754. The cubic root of 90503381 is about 448.9744232731.

The spelling of 90503381 in words is "ninety million, five hundred three thousand, three hundred eighty-one".