939481139 has 2 divisors, whose sum is σ = 939481140. Its totient is φ = 939481138.

The previous prime is 939481121. The next prime is 939481177. The reversal of 939481139 is 931184939.

It is a weak prime.

It is an emirp because it is prime and its reverse (931184939) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 939481139 - 2²⁴ = 922703923 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 939481093 and 939481102.

It is not a weakly prime, because it can be changed into another prime (939481639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469740569 + 469740570.

It is an arithmetic number, because the mean of its divisors is an integer number (469740570).

Almost surely, 2^939481139 is an apocalyptic number.

939481139 is a deficient number, since it is larger than the sum of its proper divisors (1).

939481139 is an equidigital number, since it uses as much as digits as its factorization.

939481139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 47.

The square root of 939481139 is about 30650.9565756111. The cubic root of 939481139 is about 979.4058382990.

The spelling of 939481139 in words is "nine hundred thirty-nine million, four hundred eighty-one thousand, one hundred thirty-nine".