90831604 has 6 divisors (see below), whose sum is σ = 158955314. Its totient is φ = 45415800.

The previous prime is 90831599. The next prime is 90831607. The reversal of 90831604 is 40613809.

It can be written as a sum of positive squares in only one way, i.e., 45968400 + 44863204 = 6780^2 + 6698^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90831607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11353947 + ... + 11353954.

Almost surely, 2^90831604 is an apocalyptic number.

It is an amenable number.

90831604 is a deficient number, since it is larger than the sum of its proper divisors (68123710).

90831604 is a wasteful number, since it uses less digits than its factorization.

90831604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22707905 (or 22707903 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 90831604 is about 9530.5615784171. The cubic root of 90831604 is about 449.5165243659.

The spelling of 90831604 in words is "ninety million, eight hundred thirty-one thousand, six hundred four".