90504439 has 4 divisors (see below), whose sum is σ = 90601560. Its totient is φ = 90407320.

The previous prime is 90504437. The next prime is 90504461. The reversal of 90504439 is 93440509.

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 90504439 - 2¹ = 90504437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90504433) 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, 47149 + ... + 49030.

It is an arithmetic number, because the mean of its divisors is an integer number (22650390).

Almost surely, 2^90504439 is an apocalyptic number.

90504439 is a deficient number, since it is larger than the sum of its proper divisors (97121).

90504439 is an equidigital number, since it uses as much as digits as its factorization.

90504439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97120.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 90504439 is about 9513.3821010196. The cubic root of 90504439 is about 448.9761727956.

The spelling of 90504439 in words is "ninety million, five hundred four thousand, four hundred thirty-nine".