1339931839 has 4 divisors (see below), whose sum is σ = 1341984456. Its totient is φ = 1337879224.

The previous prime is 1339931833. The next prime is 1339931867. The reversal of 1339931839 is 9381399331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1339931839 - 2⁷ = 1339931711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1339931792 and 1339931801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1339931833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025329 + ... + 1026634.

It is an arithmetic number, because the mean of its divisors is an integer number (335496114).

Almost surely, 2^1339931839 is an apocalyptic number.

1339931839 is a deficient number, since it is larger than the sum of its proper divisors (2052617).

1339931839 is an equidigital number, since it uses as much as digits as its factorization.

1339931839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052616.

The product of its digits is 472392, while the sum is 49.

The square root of 1339931839 is about 36605.0794152943. The cubic root of 1339931839 is about 1102.4550781689.

The spelling of 1339931839 in words is "one billion, three hundred thirty-nine million, nine hundred thirty-one thousand, eight hundred thirty-nine".