1912229609 has 2 divisors, whose sum is σ = 1912229610. Its totient is φ = 1912229608.

The previous prime is 1912229587. The next prime is 1912229623. The reversal of 1912229609 is 9069222191.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1118568025 + 793661584 = 33445^2 + 28172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1912229609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1912229629) 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, 956114804 + 956114805.

It is an arithmetic number, because the mean of its divisors is an integer number (956114805).

Almost surely, 2^1912229609 is an apocalyptic number.

It is an amenable number.

1912229609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912229609 is an equidigital number, since it uses as much as digits as its factorization.

1912229609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 1912229609 is about 43729.0476571352. The cubic root of 1912229609 is about 1241.2140401333.

The spelling of 1912229609 in words is "one billion, nine hundred twelve million, two hundred twenty-nine thousand, six hundred nine".