90691325 has 6 divisors (see below), whose sum is σ = 112457274. Its totient is φ = 72553040.

The previous prime is 90691309. The next prime is 90691333. The reversal of 90691325 is 52319609.

It can be written as a sum of positive squares in 3 ways, for example, as 9078169 + 81613156 = 3013^2 + 9034^2 .

It is not a de Polignac number, because 90691325 - 2⁴ = 90691309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1813802 + ... + 1813851.

It is an arithmetic number, because the mean of its divisors is an integer number (18742879).

Almost surely, 2^90691325 is an apocalyptic number.

It is an amenable number.

90691325 is a deficient number, since it is larger than the sum of its proper divisors (21765949).

90691325 is a wasteful number, since it uses less digits than its factorization.

90691325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627663 (or 3627658 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 90691325 is about 9523.1993048555. The cubic root of 90691325 is about 449.2849962214.

The spelling of 90691325 in words is "ninety million, six hundred ninety-one thousand, three hundred twenty-five".