1968444619 has 2 divisors, whose sum is σ = 1968444620. Its totient is φ = 1968444618.

The previous prime is 1968444601. The next prime is 1968444661. The reversal of 1968444619 is 9164448691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1968444619 - 2¹¹ = 1968442571 is a prime.

It is a super-2 number, since 2×1968444619² = 7749548436140110322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1968444679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984222309 + 984222310.

It is an arithmetic number, because the mean of its divisors is an integer number (984222310).

Almost surely, 2^1968444619 is an apocalyptic number.

1968444619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968444619 is an equidigital number, since it uses as much as digits as its factorization.

1968444619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 52.

The square root of 1968444619 is about 44367.1569857705. The cubic root of 1968444619 is about 1253.2596775993.

The spelling of 1968444619 in words is "one billion, nine hundred sixty-eight million, four hundred forty-four thousand, six hundred nineteen".