90919091001 has 16 divisors (see below), whose sum is σ = 125676552960. Its totient is φ = 58396208640.

The previous prime is 90919090981. The next prime is 90919091033. The reversal of 90919091001 is 10019091909.

It is not a de Polignac number, because 90919091001 - 2⁶ = 90919090937 is a prime.

It is a super-2 number, since 2×90919091001² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90919091051) 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, 1088280 + ... + 1168841.

It is an arithmetic number, because the mean of its divisors is an integer number (7854784560).

Almost surely, 2^90919091001 is an apocalyptic number.

It is an amenable number.

90919091001 is a deficient number, since it is larger than the sum of its proper divisors (34757461959).

90919091001 is a wasteful number, since it uses less digits than its factorization.

90919091001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257616.

The product of its (nonzero) digits is 6561, while the sum is 39.

The spelling of 90919091001 in words is "ninety billion, nine hundred nineteen million, ninety-one thousand, one".