1392779139 has 16 divisors (see below), whose sum is σ = 1878489600. Its totient is φ = 917854560.

The previous prime is 1392779041. The next prime is 1392779149. The reversal of 1392779139 is 9319772931.

It is a happy number.

It is not a de Polignac number, because 1392779139 - 2¹³ = 1392770947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1392779091 and 1392779100.

It is not an unprimeable number, because it can be changed into a prime (1392779149) 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 in 15 ways as a sum of consecutive naturals, for example, 86934 + ... + 101700.

It is an arithmetic number, because the mean of its divisors is an integer number (117405600).

Almost surely, 2^1392779139 is an apocalyptic number.

1392779139 is a deficient number, since it is larger than the sum of its proper divisors (485710461).

1392779139 is a wasteful number, since it uses less digits than its factorization.

1392779139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15130.

The product of its digits is 642978, while the sum is 51.

The square root of 1392779139 is about 37319.9563102638. The cubic root of 1392779139 is about 1116.7623170263.

The spelling of 1392779139 in words is "one billion, three hundred ninety-two million, seven hundred seventy-nine thousand, one hundred thirty-nine".