1392768439 has 2 divisors, whose sum is σ = 1392768440. Its totient is φ = 1392768438.

The previous prime is 1392768407. The next prime is 1392768449. The reversal of 1392768439 is 9348672931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1392768439 - 2⁵ = 1392768407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1392768449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696384219 + 696384220.

It is an arithmetic number, because the mean of its divisors is an integer number (696384220).

Almost surely, 2^1392768439 is an apocalyptic number.

1392768439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392768439 is an equidigital number, since it uses as much as digits as its factorization.

1392768439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 52.

The square root of 1392768439 is about 37319.8129550511. The cubic root of 1392768439 is about 1116.7594571837.

The spelling of 1392768439 in words is "one billion, three hundred ninety-two million, seven hundred sixty-eight thousand, four hundred thirty-nine".