90991002 has 8 divisors (see below), whose sum is σ = 181982016. Its totient is φ = 30330332.

The previous prime is 90990997. The next prime is 90991027. The reversal of 90991002 is 20019909.

It is a sphenic number, since it is the product of 3 distinct primes.

90991002 is an admirable number.

It is a super-3 number, since 3×90991002³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7582578 + ... + 7582589.

It is an arithmetic number, because the mean of its divisors is an integer number (22747752).

Almost surely, 2^90991002 is an apocalyptic number.

90991002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

90991002 is a wasteful number, since it uses less digits than its factorization.

90991002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15165172.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 90991002 is about 9538.9203791624. The cubic root of 90991002 is about 449.7793189557.

It can be divided in two parts, 9099 and 1002, that added together give a palindrome (10101).

The spelling of 90991002 in words is "ninety million, nine hundred ninety-one thousand, two".