90538939 has 4 divisors (see below), whose sum is σ = 90558000. Its totient is φ = 90519880.

The previous prime is 90538919. The next prime is 90538949. The reversal of 90538939 is 93983509.

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

It is a cyclic number.

It is not a de Polignac number, because 90538939 - 2¹⁹ = 90014651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90538919) 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, 3969 + ... + 14029.

It is an arithmetic number, because the mean of its divisors is an integer number (22639500).

Almost surely, 2^90538939 is an apocalyptic number.

90538939 is a deficient number, since it is larger than the sum of its proper divisors (19061).

90538939 is a wasteful number, since it uses less digits than its factorization.

90538939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19060.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 90538939 is about 9515.1951635266. The cubic root of 90538939 is about 449.0332149707.

The spelling of 90538939 in words is "ninety million, five hundred thirty-eight thousand, nine hundred thirty-nine".