90838523 has 4 divisors (see below), whose sum is σ = 94788048. Its totient is φ = 86889000.

The previous prime is 90838519. The next prime is 90838541. The reversal of 90838523 is 32583809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32583809 = 43 ⋅757763.

It is a cyclic number.

It is not a de Polignac number, because 90838523 - 2² = 90838519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90838513) 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, 1974728 + ... + 1974773.

It is an arithmetic number, because the mean of its divisors is an integer number (23697012).

Almost surely, 2^90838523 is an apocalyptic number.

90838523 is a deficient number, since it is larger than the sum of its proper divisors (3949525).

90838523 is a wasteful number, since it uses less digits than its factorization.

90838523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949524.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 90838523 is about 9530.9245616572. The cubic root of 90838523 is about 449.5279378891.

The spelling of 90838523 in words is "ninety million, eight hundred thirty-eight thousand, five hundred twenty-three".