90090102 has 8 divisors (see below), whose sum is σ = 180180216. Its totient is φ = 30030032.

The previous prime is 90090101. The next prime is 90090131. The reversal of 90090102 is 20109009.

It is a happy number.

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

90090102 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90090101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7507503 + ... + 7507514.

It is an arithmetic number, because the mean of its divisors is an integer number (22522527).

Almost surely, 2^90090102 is an apocalyptic number.

90090102 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.

90090102 is a wasteful number, since it uses less digits than its factorization.

90090102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15015022.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 90090102 is about 9491.5805849184. The cubic root of 90090102 is about 448.2899742329.

The spelling of 90090102 in words is "ninety million, ninety thousand, one hundred two".