9919994 has 16 divisors (see below), whose sum is σ = 17212608. Its totient is φ = 4199712.

The previous prime is 9919979. The next prime is 9919997. The reversal of 9919994 is 4999199.

It is not an unprimeable number, because it can be changed into a prime (9919997) 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, 3107 + ... + 5430.

It is an arithmetic number, because the mean of its divisors is an integer number (1075788).

Almost surely, 2^9919994 is an apocalyptic number.

9919994 is a deficient number, since it is larger than the sum of its proper divisors (7292614).

9919994 is a wasteful number, since it uses less digits than its factorization.

9919994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8629.

The product of its digits is 236196, while the sum is 50.

The square root of 9919994 is about 3149.6021971036. The cubic root of 9919994 is about 214.8673708777.

The spelling of 9919994 in words is "nine million, nine hundred nineteen thousand, nine hundred ninety-four".