939399139 has 8 divisors (see below), whose sum is σ = 1095509600. Its totient is φ = 805198968.

The previous prime is 939399133. The next prime is 939399151. The reversal of 939399139 is 931993939.

It is not a de Polignac number, because 939399139 - 2¹¹ = 939397091 is a prime.

It is a super-4 number, since 4×939399139⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 939399139.

It is not an unprimeable number, because it can be changed into a prime (939399133) 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, 1369044 + ... + 1369729.

It is an arithmetic number, because the mean of its divisors is an integer number (136938700).

Almost surely, 2^939399139 is an apocalyptic number.

939399139 is a deficient number, since it is larger than the sum of its proper divisors (156110461).

939399139 is an equidigital number, since it uses as much as digits as its factorization.

939399139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738794 (or 2738780 counting only the distinct ones).

The product of its digits is 1594323, while the sum is 55.

The square root of 939399139 is about 30649.6189046455. The cubic root of 939399139 is about 979.3773425645.

The spelling of 939399139 in words is "nine hundred thirty-nine million, three hundred ninety-nine thousand, one hundred thirty-nine".