1391992633 has 2 divisors, whose sum is σ = 1391992634. Its totient is φ = 1391992632.

The previous prime is 1391992631. The next prime is 1391992661. The reversal of 1391992633 is 3362991931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 797949504 + 594043129 = 28248^2 + 24373^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391992633 - 2¹ = 1391992631 is a prime.

Together with 1391992631, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1391992631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695996316 + 695996317.

It is an arithmetic number, because the mean of its divisors is an integer number (695996317).

Almost surely, 2^1391992633 is an apocalyptic number.

It is an amenable number.

1391992633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391992633 is an equidigital number, since it uses as much as digits as its factorization.

1391992633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 46.

The square root of 1391992633 is about 37309.4174840616. The cubic root of 1391992633 is about 1116.5520645836.

The spelling of 1391992633 in words is "one billion, three hundred ninety-one million, nine hundred ninety-two thousand, six hundred thirty-three".