90909092 has 24 divisors (see below), whose sum is σ = 164559360. Its totient is φ = 43917120.

The previous prime is 90909089. The next prime is 90909101. The reversal of 90909092 is 29090909.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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, 11792 + ... + 17912.

It is an arithmetic number, because the mean of its divisors is an integer number (6856640).

Almost surely, 2^90909092 is an apocalyptic number.

It is an amenable number.

90909092 is a deficient number, since it is larger than the sum of its proper divisors (73650268).

90909092 is a wasteful number, since it uses less digits than its factorization.

90909092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6251 (or 6249 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 90909092 is about 9534.6259496637. The cubic root of 90909092 is about 449.6443148212.

The spelling of 90909092 in words is "ninety million, nine hundred nine thousand, ninety-two".