9942939 has 16 divisors (see below), whose sum is σ = 14974240. Its totient is φ = 6518880.

The previous prime is 9942931. The next prime is 9942941. The reversal of 9942939 is 9392499.

It is not a de Polignac number, because 9942939 - 2³ = 9942931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9942894 and 9942903.

It is not an unprimeable number, because it can be changed into a prime (9942931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1372 + ... + 4665.

It is an arithmetic number, because the mean of its divisors is an integer number (935890).

Almost surely, 2^9942939 is an apocalyptic number.

9942939 is a deficient number, since it is larger than the sum of its proper divisors (5031301).

9942939 is a wasteful number, since it uses less digits than its factorization.

9942939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6107 (or 6101 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 9942939 is about 3153.2426167360. The cubic root of 9942939 is about 215.0329064470.

The spelling of 9942939 in words is "nine million, nine hundred forty-two thousand, nine hundred thirty-nine".