90790531 has 8 divisors (see below), whose sum is σ = 102920720. Its totient is φ = 79395552.

The previous prime is 90790529. The next prime is 90790543. The reversal of 90790531 is 13509709.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90790531 - 2¹ = 90790529 is a prime.

It is a super-2 number, since 2×90790531² = 16485841038523922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90790571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183540 + ... + 184033.

It is an arithmetic number, because the mean of its divisors is an integer number (12865090).

Almost surely, 2^90790531 is an apocalyptic number.

90790531 is a deficient number, since it is larger than the sum of its proper divisors (12130189).

90790531 is a wasteful number, since it uses less digits than its factorization.

90790531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367605.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 90790531 is about 9528.4065299503. The cubic root of 90790531 is about 449.4487587608.

The spelling of 90790531 in words is "ninety million, seven hundred ninety thousand, five hundred thirty-one".