9090090972 has 24 divisors (see below), whose sum is σ = 23566902800. Its totient is φ = 3030030288.

The previous prime is 9090090967. The next prime is 9090091007. The reversal of 9090090972 is 2790900909.

It is a super-3 number, since 3×9090090972³ (a number of 31 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42083647 + ... + 42083862.

Almost surely, 2^9090090972 is an apocalyptic number.

It is an amenable number.

9090090972 is an abundant number, since it is smaller than the sum of its proper divisors (14476811828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9090090972 is a wasteful number, since it uses less digits than its factorization.

9090090972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84167522 (or 84167514 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 9090090972 is about 95341.9685762781. The cubic root of 9090090972 is about 2087.0014134386.

The spelling of 9090090972 in words is "nine billion, ninety million, ninety thousand, nine hundred seventy-two".