9090090971 has 16 divisors (see below), whose sum is σ = 10109460480. Its totient is φ = 8116688160.

The previous prime is 9090090967. The next prime is 9090091007. The reversal of 9090090971 is 1790900909.

It is a cyclic number.

It is not a de Polignac number, because 9090090971 - 2² = 9090090967 is a prime.

It is a super-3 number, since 3×9090090971³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9090090271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1553870 + ... + 1559708.

It is an arithmetic number, because the mean of its divisors is an integer number (631841280).

Almost surely, 2^9090090971 is an apocalyptic number.

9090090971 is a deficient number, since it is larger than the sum of its proper divisors (1019369509).

9090090971 is a wasteful number, since it uses less digits than its factorization.

9090090971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9746.

The product of its (nonzero) digits is 45927, while the sum is 44.

The square root of 9090090971 is about 95341.9685710338. The cubic root of 9090090971 is about 2087.0014133620.

The spelling of 9090090971 in words is "nine billion, ninety million, ninety thousand, nine hundred seventy-one".