1968565769 has 2 divisors, whose sum is σ = 1968565770. Its totient is φ = 1968565768.

The previous prime is 1968565763. The next prime is 1968565771. The reversal of 1968565769 is 9675658691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1968075769 + 490000 = 44363^2 + 700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1968565769 is a prime.

It is a super-2 number, since 2×1968565769² = 7750502373757122722, which contains 22 as substring.

Together with 1968565771, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1968565763) 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, 984282884 + 984282885.

It is an arithmetic number, because the mean of its divisors is an integer number (984282885).

Almost surely, 2^1968565769 is an apocalyptic number.

It is an amenable number.

1968565769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968565769 is an equidigital number, since it uses as much as digits as its factorization.

1968565769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24494400, while the sum is 62.

The square root of 1968565769 is about 44368.5222764969. The cubic root of 1968565769 is about 1253.2853881347.

The spelling of 1968565769 in words is "one billion, nine hundred sixty-eight million, five hundred sixty-five thousand, seven hundred sixty-nine".