90909200902 has 32 divisors (see below), whose sum is σ = 147263235840. Its totient is φ = 41841115680.

The previous prime is 90909200881. The next prime is 90909200923. The reversal of 90909200902 is 20900290909.

It is an interprime number because it is at equal distance from previous prime (90909200881) and next prime (90909200923).

It is a super-2 number, since 2×90909200902² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 30930549 + ... + 30933487.

It is an arithmetic number, because the mean of its divisors is an integer number (4601976120).

Almost surely, 2^90909200902 is an apocalyptic number.

90909200902 is a deficient number, since it is larger than the sum of its proper divisors (56354034938).

90909200902 is a wasteful number, since it uses less digits than its factorization.

90909200902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5868.

The product of its (nonzero) digits is 26244, while the sum is 40.

The spelling of 90909200902 in words is "ninety billion, nine hundred nine million, two hundred thousand, nine hundred two".