1392789813 has 32 divisors (see below), whose sum is σ = 2003097600. Its totient is φ = 858151296.

The previous prime is 1392789791. The next prime is 1392789913. The reversal of 1392789813 is 3189872931.

It is not a de Polignac number, because 1392789813 - 2⁹ = 1392789301 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392789613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459220 + ... + 462242.

It is an arithmetic number, because the mean of its divisors is an integer number (62596800).

Almost surely, 2^1392789813 is an apocalyptic number.

It is an amenable number.

1392789813 is a deficient number, since it is larger than the sum of its proper divisors (610307787).

1392789813 is a wasteful number, since it uses less digits than its factorization.

1392789813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241.

The product of its digits is 653184, while the sum is 51.

The square root of 1392789813 is about 37320.0993165881. The cubic root of 1392789813 is about 1116.7651699052.

It can be divided in two parts, 13927 and 89813, that added together give a triangular number (103740 = T₄₅₅).

The spelling of 1392789813 in words is "one billion, three hundred ninety-two million, seven hundred eighty-nine thousand, eight hundred thirteen".