1392790813 has 2 divisors, whose sum is σ = 1392790814. Its totient is φ = 1392790812.

The previous prime is 1392790811. The next prime is 1392790849. The reversal of 1392790813 is 3180972931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1392558489 + 232324 = 37317^2 + 482^2 .

It is an emirp because it is prime and its reverse (3180972931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1392790813 - 2¹ = 1392790811 is a prime.

Together with 1392790811, 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 1392790813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1392790811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696395406 + 696395407.

It is an arithmetic number, because the mean of its divisors is an integer number (696395407).

Almost surely, 2^1392790813 is an apocalyptic number.

It is an amenable number.

1392790813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392790813 is an equidigital number, since it uses as much as digits as its factorization.

1392790813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 1392790813 is about 37320.1127141921. The cubic root of 1392790813 is about 1116.7654371781.

The spelling of 1392790813 in words is "one billion, three hundred ninety-two million, seven hundred ninety thousand, eight hundred thirteen".