90909091002 has 32 divisors (see below), whose sum is σ = 191565324288. Its totient is φ = 28704090096.

The previous prime is 90909090977. The next prime is 90909091027. The reversal of 90909091002 is 20019090909.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (90909090977) and next prime (90909091027).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3183658 + ... + 3212085.

It is an arithmetic number, because the mean of its divisors is an integer number (5986416384).

Almost surely, 2^90909091002 is an apocalyptic number.

90909091002 is an abundant number, since it is smaller than the sum of its proper divisors (100656233286).

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

90909091002 is a wasteful number, since it uses less digits than its factorization.

90909091002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395874.

The product of its (nonzero) digits is 13122, while the sum is 39.

The spelling of 90909091002 in words is "ninety billion, nine hundred nine million, ninety-one thousand, two".