1391390513839 has 2 divisors, whose sum is σ = 1391390513840. Its totient is φ = 1391390513838.

The previous prime is 1391390513837. The next prime is 1391390513857. The reversal of 1391390513839 is 9383150931931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1391390513839 - 2¹ = 1391390513837 is a prime.

Together with 1391390513837, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1391390513839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391390513833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695695256919 + 695695256920.

It is an arithmetic number, because the mean of its divisors is an integer number (695695256920).

Almost surely, 2^{1391390513839} is an apocalyptic number.

1391390513839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391390513839 is an equidigital number, since it uses as much as digits as its factorization.

1391390513839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2361960, while the sum is 55.

The spelling of 1391390513839 in words is "one trillion, three hundred ninety-one billion, three hundred ninety million, five hundred thirteen thousand, eight hundred thirty-nine".