90161924 has 12 divisors (see below), whose sum is σ = 157892700. Its totient is φ = 45049728.

The previous prime is 90161921. The next prime is 90161969. The reversal of 90161924 is 42916109.

It can be written as a sum of positive squares in 2 ways, for example, as 81577024 + 8584900 = 9032^2 + 2930^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (90161921) 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 3 ways as a sum of consecutive naturals, for example, 569 + ... + 13440.

It is an arithmetic number, because the mean of its divisors is an integer number (13157725).

Almost surely, 2^90161924 is an apocalyptic number.

It is an amenable number.

90161924 is a deficient number, since it is larger than the sum of its proper divisors (67730776).

90161924 is a wasteful number, since it uses less digits than its factorization.

90161924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15622 (or 15620 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 90161924 is about 9495.3632895219. The cubic root of 90161924 is about 448.4090717789.

The spelling of 90161924 in words is "ninety million, one hundred sixty-one thousand, nine hundred twenty-four".