939888939 has 32 divisors (see below), whose sum is σ = 1420001280. Its totient is φ = 548007200.

The previous prime is 939888923. The next prime is 939888973.

939888939 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 939888939 - 2⁴ = 939888923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 939888939.

It is not an unprimeable number, because it can be changed into a prime (939888139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86374 + ... + 96644.

It is an arithmetic number, because the mean of its divisors is an integer number (44375040).

Almost surely, 2^939888939 is an apocalyptic number.

939888939 is a deficient number, since it is larger than the sum of its proper divisors (480112341).

939888939 is a wasteful number, since it uses less digits than its factorization.

939888939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10391.

The product of its digits is 30233088, while the sum is 66.

The square root of 939888939 is about 30657.6081748071. The cubic root of 939888939 is about 979.5475278298.

The spelling of 939888939 in words is "nine hundred thirty-nine million, eight hundred eighty-eight thousand, nine hundred thirty-nine".