90038523 has 4 divisors (see below), whose sum is σ = 120051368. Its totient is φ = 60025680.

The previous prime is 90038521. The next prime is 90038561. The reversal of 90038523 is 32583009.

It is a happy number.

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

It is not a de Polignac number, because 90038523 - 2¹ = 90038521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90038521) by changing a digit.

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, 15006418 + ... + 15006423.

It is an arithmetic number, because the mean of its divisors is an integer number (30012842).

Almost surely, 2^90038523 is an apocalyptic number.

90038523 is a deficient number, since it is larger than the sum of its proper divisors (30012845).

90038523 is a wasteful number, since it uses less digits than its factorization.

90038523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30012844.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 90038523 is about 9488.8631036600. The cubic root of 90038523 is about 448.2044052222.

The spelling of 90038523 in words is "ninety million, thirty-eight thousand, five hundred twenty-three".