9090100 has 18 divisors (see below), whose sum is σ = 19725734. Its totient is φ = 3636000.

The previous prime is 9090061. The next prime is 9090127. The reversal of 9090100 is 10909.

It can be written as a sum of positive squares in 3 ways, for example, as 17956 + 9072144 = 134^2 + 3012^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45351 + ... + 45550.

Almost surely, 2^9090100 is an apocalyptic number.

It is an amenable number.

9090100 is an abundant number, since it is smaller than the sum of its proper divisors (10635634).

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

9090100 is a wasteful number, since it uses less digits than its factorization.

9090100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90915 (or 90908 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 9090100 is about 3014.9792702438. The cubic root of 9090100 is about 208.7002104354.

The spelling of 9090100 in words is "nine million, ninety thousand, one hundred".