1916239399 has 2 divisors, whose sum is σ = 1916239400. Its totient is φ = 1916239398.

The previous prime is 1916239393. The next prime is 1916239453. The reversal of 1916239399 is 9939326191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1916239399 - 2¹⁵ = 1916206631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1916239393) 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, 958119699 + 958119700.

It is an arithmetic number, because the mean of its divisors is an integer number (958119700).

Almost surely, 2^1916239399 is an apocalyptic number.

1916239399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916239399 is an equidigital number, since it uses as much as digits as its factorization.

1916239399 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 1916239399 is about 43774.8717759401. The cubic root of 1916239399 is about 1242.0810093990.

The spelling of 1916239399 in words is "one billion, nine hundred sixteen million, two hundred thirty-nine thousand, three hundred ninety-nine".