90909131001 has 16 divisors (see below), whose sum is σ = 130547317824. Its totient is φ = 55939310784.

The previous prime is 90909130937. The next prime is 90909131041. The reversal of 90909131001 is 10013190909.

It is not a de Polignac number, because 90909131001 - 2⁶ = 90909130937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90909131041) 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, 395050 + ... + 581276.

It is an arithmetic number, because the mean of its divisors is an integer number (8159207364).

Almost surely, 2^90909131001 is an apocalyptic number.

It is an amenable number.

90909131001 is a deficient number, since it is larger than the sum of its proper divisors (39638186823).

90909131001 is a wasteful number, since it uses less digits than its factorization.

90909131001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198760.

The product of its (nonzero) digits is 2187, while the sum is 33.

The spelling of 90909131001 in words is "ninety billion, nine hundred nine million, one hundred thirty-one thousand, one".