90492173 has 8 divisors (see below), whose sum is σ = 96804792. Its totient is φ = 84289536.

The previous prime is 90492169. The next prime is 90492179. The reversal of 90492173 is 37129409.

It can be written as a sum of positive squares in 4 ways, for example, as 52027369 + 38464804 = 7213^2 + 6202^2 .

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

It is not a de Polignac number, because 90492173 - 2² = 90492169 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 (90492179) 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, 25790 + ... + 29087.

It is an arithmetic number, because the mean of its divisors is an integer number (12100599).

Almost surely, 2^90492173 is an apocalyptic number.

It is an amenable number.

90492173 is a deficient number, since it is larger than the sum of its proper divisors (6312619).

90492173 is a wasteful number, since it uses less digits than its factorization.

90492173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54991.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 90492173 is about 9512.7374083384. The cubic root of 90492173 is about 448.9558887424.

The spelling of 90492173 in words is "ninety million, four hundred ninety-two thousand, one hundred seventy-three".