9939994 has 4 divisors (see below), whose sum is σ = 14909994. Its totient is φ = 4969996.

The previous prime is 9939971. The next prime is 9940001. The reversal of 9939994 is 4999399.

9939994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4999399 = 101 ⋅49499.

It can be written as a sum of positive squares in only one way, i.e., 9840769 + 99225 = 3137^2 + 315^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2484997 + ... + 2485000.

Almost surely, 2^9939994 is an apocalyptic number.

9939994 is a deficient number, since it is larger than the sum of its proper divisors (4970000).

9939994 is a wasteful number, since it uses less digits than its factorization.

9939994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4969999.

The product of its digits is 708588, while the sum is 52.

The square root of 9939994 is about 3152.7756025445. The cubic root of 9939994 is about 215.0116741453.

The spelling of 9939994 in words is "nine million, nine hundred thirty-nine thousand, nine hundred ninety-four".