1391962399 has 2 divisors, whose sum is σ = 1391962400. Its totient is φ = 1391962398.

The previous prime is 1391962391. The next prime is 1391962421. The reversal of 1391962399 is 9932691931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1391962399 - 2³ = 1391962391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391962391) 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, 695981199 + 695981200.

It is an arithmetic number, because the mean of its divisors is an integer number (695981200).

Almost surely, 2^1391962399 is an apocalyptic number.

1391962399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391962399 is an equidigital number, since it uses as much as digits as its factorization.

1391962399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 708588, while the sum is 52.

The square root of 1391962399 is about 37309.0123026595. The cubic root of 1391962399 is about 1116.5439807095.

The spelling of 1391962399 in words is "one billion, three hundred ninety-one million, nine hundred sixty-two thousand, three hundred ninety-nine".