9090090973 has 4 divisors (see below), whose sum is σ = 9156442140. Its totient is φ = 9023739808.

The previous prime is 9090090967. The next prime is 9090091007. The reversal of 9090090973 is 3790900909.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5096103769 + 3993987204 = 71387^2 + 63198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9090090973 is a prime.

It is a super-3 number, since 3×9090090973³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090090073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33175378 + ... + 33175651.

It is an arithmetic number, because the mean of its divisors is an integer number (2289110535).

Almost surely, 2^9090090973 is an apocalyptic number.

It is an amenable number.

9090090973 is a deficient number, since it is larger than the sum of its proper divisors (66351167).

9090090973 is a wasteful number, since it uses less digits than its factorization.

9090090973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66351166.

The product of its (nonzero) digits is 137781, while the sum is 46.

The square root of 9090090973 is about 95341.9685815224. The cubic root of 9090090973 is about 2087.0014135151.

The spelling of 9090090973 in words is "nine billion, ninety million, ninety thousand, nine hundred seventy-three".