9899090 has 8 divisors (see below), whose sum is σ = 17818380. Its totient is φ = 3959632.

The previous prime is 9899069. The next prime is 9899119. The reversal of 9899090 is 909989.

It can be written as a sum of positive squares in 2 ways, for example, as 7991929 + 1907161 = 2827^2 + 1381^2 .

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

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, 494945 + ... + 494964.

Almost surely, 2^9899090 is an apocalyptic number.

9899090 is a deficient number, since it is larger than the sum of its proper divisors (7919290).

9899090 is a wasteful number, since it uses less digits than its factorization.

9899090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989916.

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 9899090 is about 3146.2819326945. The cubic root of 9899090 is about 214.7163376480.

The spelling of 9899090 in words is "nine million, eight hundred ninety-nine thousand, ninety".