1923972899 has 2 divisors, whose sum is σ = 1923972900. Its totient is φ = 1923972898.

The previous prime is 1923972893. The next prime is 1923972913. The reversal of 1923972899 is 9982793291.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1923972899 - 2⁸ = 1923972643 is a prime.

It is not a weakly prime, because it can be changed into another prime (1923972893) 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, 961986449 + 961986450.

It is an arithmetic number, because the mean of its divisors is an integer number (961986450).

Almost surely, 2^1923972899 is an apocalyptic number.

1923972899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1923972899 is an equidigital number, since it uses as much as digits as its factorization.

1923972899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 59.

The square root of 1923972899 is about 43863.1154730259. The cubic root of 1923972899 is about 1243.7496840517.

The spelling of 1923972899 in words is "one billion, nine hundred twenty-three million, nine hundred seventy-two thousand, eight hundred ninety-nine".