9904921906 has 8 divisors (see below), whose sum is σ = 16208054064. Its totient is φ = 4502237220.

The previous prime is 9904921889. The next prime is 9904921913. The reversal of 9904921906 is 6091294099.

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

It is a self number, because there is not a number n which added to its sum of digits gives 9904921906.

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, 225111840 + ... + 225111883.

It is an arithmetic number, because the mean of its divisors is an integer number (2026006758).

Almost surely, 2^9904921906 is an apocalyptic number.

9904921906 is a deficient number, since it is larger than the sum of its proper divisors (6303132158).

9904921906 is a wasteful number, since it uses less digits than its factorization.

9904921906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450223736.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 9904921906 is about 99523.4741455502. The cubic root of 9904921906 is about 2147.5849504735.

The spelling of 9904921906 in words is "nine billion, nine hundred four million, nine hundred twenty-one thousand, nine hundred six".