1338347839 has 2 divisors, whose sum is σ = 1338347840. Its totient is φ = 1338347838.

The previous prime is 1338347837. The next prime is 1338347861. The reversal of 1338347839 is 9387438331.

It is a weak prime.

It is an emirp because it is prime and its reverse (9387438331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1338347839 - 2¹ = 1338347837 is a prime.

Together with 1338347837, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1338347792 and 1338347801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1338347833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669173919 + 669173920.

It is an arithmetic number, because the mean of its divisors is an integer number (669173920).

Almost surely, 2^1338347839 is an apocalyptic number.

1338347839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338347839 is an equidigital number, since it uses as much as digits as its factorization.

1338347839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 49.

The square root of 1338347839 is about 36583.4366756323. The cubic root of 1338347839 is about 1102.0204845649.

The spelling of 1338347839 in words is "one billion, three hundred thirty-eight million, three hundred forty-seven thousand, eight hundred thirty-nine".