1912999903 has 2 divisors, whose sum is σ = 1912999904. Its totient is φ = 1912999902.

The previous prime is 1912999883. The next prime is 1912999961. The reversal of 1912999903 is 3099992191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1912999903 - 2⁹ = 1912999391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1912999003) 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, 956499951 + 956499952.

It is an arithmetic number, because the mean of its divisors is an integer number (956499952).

Almost surely, 2^1912999903 is an apocalyptic number.

1912999903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912999903 is an equidigital number, since it uses as much as digits as its factorization.

1912999903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 354294, while the sum is 52.

The square root of 1912999903 is about 43737.8543483788. The cubic root of 1912999903 is about 1241.3806817981.

The spelling of 1912999903 in words is "one billion, nine hundred twelve million, nine hundred ninety-nine thousand, nine hundred three".