7989939 has 12 divisors (see below), whose sum is σ = 11585496. Its totient is φ = 5306112.

The previous prime is 7989929. The next prime is 7989973. The reversal of 7989939 is 9399897.

It is a happy number.

It is not a de Polignac number, because 7989939 - 2⁵ = 7989907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7989929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 979 + ... + 4115.

It is an arithmetic number, because the mean of its divisors is an integer number (965458).

Almost surely, 2^7989939 is an apocalyptic number.

7989939 is a deficient number, since it is larger than the sum of its proper divisors (3595557).

7989939 is a wasteful number, since it uses less digits than its factorization.

7989939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426 (or 3423 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 7989939 is about 2826.6480148756. The cubic root of 7989939 is about 199.9161231616.

The spelling of 7989939 in words is "seven million, nine hundred eighty-nine thousand, nine hundred thirty-nine".