1392391879 has 2 divisors, whose sum is σ = 1392391880. Its totient is φ = 1392391878.

The previous prime is 1392391859. The next prime is 1392391883. The reversal of 1392391879 is 9781932931.

It is a strong prime.

It is an emirp because it is prime and its reverse (9781932931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1392391879 is a prime.

It is a super-3 number, since 3×1392391879³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1392391849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696195939 + 696195940.

It is an arithmetic number, because the mean of its divisors is an integer number (696195940).

Almost surely, 2^1392391879 is an apocalyptic number.

1392391879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392391879 is an equidigital number, since it uses as much as digits as its factorization.

1392391879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 52.

The square root of 1392391879 is about 37314.7675726380. The cubic root of 1392391879 is about 1116.6588027762.

The spelling of 1392391879 in words is "one billion, three hundred ninety-two million, three hundred ninety-one thousand, eight hundred seventy-nine".