9939964 has 24 divisors (see below), whose sum is σ = 18905600. Its totient is φ = 4555440.

The previous prime is 9939961. The next prime is 9939971. The reversal of 9939964 is 4699399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9939961) 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, 247 + ... + 4465.

Almost surely, 2^9939964 is an apocalyptic number.

It is an amenable number.

9939964 is a deficient number, since it is larger than the sum of its proper divisors (8965636).

9939964 is a wasteful number, since it uses less digits than its factorization.

9939964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273 (or 4271 counting only the distinct ones).

The product of its digits is 472392, while the sum is 49.

The square root of 9939964 is about 3152.7708448284. The cubic root of 9939964 is about 215.0114578354.

The spelling of 9939964 in words is "nine million, nine hundred thirty-nine thousand, nine hundred sixty-four".