9959990 has 48 divisors (see below), whose sum is σ = 19751040. Its totient is φ = 3611520.

The previous prime is 9959987. The next prime is 9960023. The reversal of 9959990 is 999599.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111866 + ... + 111954.

It is an arithmetic number, because the mean of its divisors is an integer number (411480).

Almost surely, 2^9959990 is an apocalyptic number.

9959990 is a deficient number, since it is larger than the sum of its proper divisors (9791050).

9959990 is a wasteful number, since it uses less digits than its factorization.

9959990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 295245, while the sum is 50.

The square root of 9959990 is about 3155.9451833009. The cubic root of 9959990 is about 215.1557551738.

The spelling of 9959990 in words is "nine million, nine hundred fifty-nine thousand, nine hundred ninety".