90909002 has 4 divisors (see below), whose sum is σ = 136363506. Its totient is φ = 45454500.

The previous prime is 90908959. The next prime is 90909031. The reversal of 90909002 is 20090909.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 90079081 + 829921 = 9491^2 + 911^2 .

It is a super-3 number, since 3×90909002³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22727249 + ... + 22727252.

Almost surely, 2^90909002 is an apocalyptic number.

90909002 is a deficient number, since it is larger than the sum of its proper divisors (45454504).

90909002 is a wasteful number, since it uses less digits than its factorization.

90909002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45454503.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 90909002 is about 9534.6212300227. The cubic root of 90909002 is about 449.6441664385.

The spelling of 90909002 in words is "ninety million, nine hundred nine thousand, two".