1968444601 has 2 divisors, whose sum is σ = 1968444602. Its totient is φ = 1968444600.

The previous prime is 1968444589. The next prime is 1968444619. The reversal of 1968444601 is 1064448691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1369370025 + 599074576 = 37005^2 + 24476^2 .

It is an emirp because it is prime and its reverse (1064448691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1968444601 - 2⁹ = 1968444089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1968444661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984222300 + 984222301.

It is an arithmetic number, because the mean of its divisors is an integer number (984222301).

Almost surely, 2^1968444601 is an apocalyptic number.

It is an amenable number.

1968444601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968444601 is an equidigital number, since it uses as much as digits as its factorization.

1968444601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 1968444601 is about 44367.1567829177. The cubic root of 1968444601 is about 1253.2596737792.

The spelling of 1968444601 in words is "one billion, nine hundred sixty-eight million, four hundred forty-four thousand, six hundred one".