1396349839 has 2 divisors, whose sum is σ = 1396349840. Its totient is φ = 1396349838.

The previous prime is 1396349831. The next prime is 1396349863. The reversal of 1396349839 is 9389436931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1396349839 - 2³ = 1396349831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1396349839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1396349831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698174919 + 698174920.

It is an arithmetic number, because the mean of its divisors is an integer number (698174920).

Almost surely, 2^1396349839 is an apocalyptic number.

1396349839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396349839 is an equidigital number, since it uses as much as digits as its factorization.

1396349839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 55.

The square root of 1396349839 is about 37367.7647043545. The cubic root of 1396349839 is about 1117.7158590533.

The spelling of 1396349839 in words is "one billion, three hundred ninety-six million, three hundred forty-nine thousand, eight hundred thirty-nine".