90331553 has 4 divisors (see below), whose sum is σ = 97280148. Its totient is φ = 83382960.

The previous prime is 90331547. The next prime is 90331583. The reversal of 90331553 is 35513309.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30547729 + 59783824 = 5527^2 + 7732^2 .

It is a cyclic number.

It is not a de Polignac number, because 90331553 - 2²⁴ = 73554337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90331543) 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, 3474278 + ... + 3474303.

It is an arithmetic number, because the mean of its divisors is an integer number (24320037).

Almost surely, 2^90331553 is an apocalyptic number.

It is an amenable number.

90331553 is a deficient number, since it is larger than the sum of its proper divisors (6948595).

90331553 is a wasteful number, since it uses less digits than its factorization.

90331553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6948594.

The product of its (nonzero) digits is 6075, while the sum is 29.

The square root of 90331553 is about 9504.2912939366. The cubic root of 90331553 is about 448.6901051596.

The spelling of 90331553 in words is "ninety million, three hundred thirty-one thousand, five hundred fifty-three".