1392631169 has 2 divisors, whose sum is σ = 1392631170. Its totient is φ = 1392631168.

The previous prime is 1392631157. The next prime is 1392631183. The reversal of 1392631169 is 9611362931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1171008400 + 221622769 = 34220^2 + 14887^2 .

It is an emirp because it is prime and its reverse (9611362931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1392631169 - 2⁸ = 1392630913 is a prime.

It is a super-2 number, since 2×1392631169² = 3878843145740613122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1392631129) 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, 696315584 + 696315585.

It is an arithmetic number, because the mean of its divisors is an integer number (696315585).

Almost surely, 2^1392631169 is an apocalyptic number.

It is an amenable number.

1392631169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392631169 is an equidigital number, since it uses as much as digits as its factorization.

1392631169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 41.

The square root of 1392631169 is about 37317.9738061969. The cubic root of 1392631169 is about 1116.7227670437.

The spelling of 1392631169 in words is "one billion, three hundred ninety-two million, six hundred thirty-one thousand, one hundred sixty-nine".