1912064809 has 2 divisors, whose sum is σ = 1912064810. Its totient is φ = 1912064808.

The previous prime is 1912064771. The next prime is 1912064813. The reversal of 1912064809 is 9084602191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1708003584 + 204061225 = 41328^2 + 14285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1912064809 - 2²⁵ = 1878510377 is a prime.

It is not a weakly prime, because it can be changed into another prime (1912064899) 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, 956032404 + 956032405.

It is an arithmetic number, because the mean of its divisors is an integer number (956032405).

Almost surely, 2^1912064809 is an apocalyptic number.

It is an amenable number.

1912064809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912064809 is an equidigital number, since it uses as much as digits as its factorization.

1912064809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1912064809 is about 43727.1632855368. The cubic root of 1912064809 is about 1241.1783822902.

The spelling of 1912064809 in words is "one billion, nine hundred twelve million, sixty-four thousand, eight hundred nine".