9899994 has 16 divisors (see below), whose sum is σ = 21323232. Its totient is φ = 3046128.

The previous prime is 9899993. The next prime is 9899999. The reversal of 9899994 is 4999989.

It is not an unprimeable number, because it can be changed into a prime (9899993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63384 + ... + 63539.

It is an arithmetic number, because the mean of its divisors is an integer number (1332702).

Almost surely, 2^9899994 is an apocalyptic number.

9899994 is an abundant number, since it is smaller than the sum of its proper divisors (11423238).

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

9899994 is a wasteful number, since it uses less digits than its factorization.

9899994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126941.

The product of its digits is 1889568, while the sum is 57.

The square root of 9899994 is about 3146.4255910477. The cubic root of 9899994 is about 214.7228735235.

The spelling of 9899994 in words is "nine million, eight hundred ninety-nine thousand, nine hundred ninety-four".