1912168919 has 2 divisors, whose sum is σ = 1912168920. Its totient is φ = 1912168918.

The previous prime is 1912168903. The next prime is 1912168943. The reversal of 1912168919 is 9198612191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1912168919 - 2⁴ = 1912168903 is a prime.

It is a super-2 number, since 2×1912168919² = 7312779949579257122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1912168519) 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, 956084459 + 956084460.

It is an arithmetic number, because the mean of its divisors is an integer number (956084460).

Almost surely, 2^1912168919 is an apocalyptic number.

1912168919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912168919 is an equidigital number, since it uses as much as digits as its factorization.

1912168919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 47.

The square root of 1912168919 is about 43728.3537192975. The cubic root of 1912168919 is about 1241.2009088516.

The spelling of 1912168919 in words is "one billion, nine hundred twelve million, one hundred sixty-eight thousand, nine hundred nineteen".