939139111 has 4 divisors (see below), whose sum is σ = 939212824. Its totient is φ = 939065400.

The previous prime is 939139099. The next prime is 939139133. The reversal of 939139111 is 111931939.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 111931939 = 7 ⋅15990277.

It is a 3-Lehmer number, since φ(939139111) divides (939139111-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-939139111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939139711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12285 + ... + 45046.

It is an arithmetic number, because the mean of its divisors is an integer number (234803206).

Almost surely, 2^939139111 is an apocalyptic number.

939139111 is the 16381-st nonagonal number.

939139111 is a deficient number, since it is larger than the sum of its proper divisors (73713).

939139111 is a wasteful number, since it uses less digits than its factorization.

939139111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73712.

The product of its digits is 6561, while the sum is 37.

The square root of 939139111 is about 30645.3766659834. The cubic root of 939139111 is about 979.2869695370.

The spelling of 939139111 in words is "nine hundred thirty-nine million, one hundred thirty-nine thousand, one hundred eleven".