1219916519 has 2 divisors, whose sum is σ = 1219916520. Its totient is φ = 1219916518.

The previous prime is 1219916513. The next prime is 1219916521. The reversal of 1219916519 is 9156199121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1219916519 - 2⁸ = 1219916263 is a prime.

It is a super-2 number, since 2×1219916519² = 2976392626658154722, which contains 22 as substring.

Together with 1219916521, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1219916519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1219916513) 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, 609958259 + 609958260.

It is an arithmetic number, because the mean of its divisors is an integer number (609958260).

Almost surely, 2^1219916519 is an apocalyptic number.

1219916519 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219916519 is an equidigital number, since it uses as much as digits as its factorization.

1219916519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 44.

The square root of 1219916519 is about 34927.3033456635. The cubic root of 1219916519 is about 1068.5053574808.

The spelling of 1219916519 in words is "one billion, two hundred nineteen million, nine hundred sixteen thousand, five hundred nineteen".