1912973939 has 2 divisors, whose sum is σ = 1912973940. Its totient is φ = 1912973938.

The previous prime is 1912973873. The next prime is 1912974029. The reversal of 1912973939 is 9393792191.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1912973939 - 2²⁰ = 1911925363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1912973239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956486969 + 956486970.

It is an arithmetic number, because the mean of its divisors is an integer number (956486970).

Almost surely, 2^1912973939 is an apocalyptic number.

1912973939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912973939 is an equidigital number, since it uses as much as digits as its factorization.

1912973939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 826686, while the sum is 53.

The square root of 1912973939 is about 43737.5575335432. The cubic root of 1912973939 is about 1241.3750656009.

The spelling of 1912973939 in words is "one billion, nine hundred twelve million, nine hundred seventy-three thousand, nine hundred thirty-nine".