9999690 has 16 divisors (see below), whose sum is σ = 23999328. Its totient is φ = 2666576.

The previous prime is 9999677. The next prime is 9999713. The reversal of 9999690 is 969999.

It is a super-2 number, since 2×9999690² = 199987600192200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166632 + ... + 166691.

It is an arithmetic number, because the mean of its divisors is an integer number (1499958).

Almost surely, 2^9999690 is an apocalyptic number.

9999690 is an abundant number, since it is smaller than the sum of its proper divisors (13999638).

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

9999690 is a wasteful number, since it uses less digits than its factorization.

9999690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333333.

The product of its (nonzero) digits is 354294, while the sum is 51.

The square root of 9999690 is about 3162.2286444848. The cubic root of 9999690 is about 215.4412427310.

The spelling of 9999690 in words is "nine million, nine hundred ninety-nine thousand, six hundred ninety".