768444913 has 2 divisors, whose sum is σ = 768444914. Its totient is φ = 768444912.

The previous prime is 768444841. The next prime is 768444967. The reversal of 768444913 is 319444867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 585978849 + 182466064 = 24207^2 + 13508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-768444913 is a prime.

It is not a weakly prime, because it can be changed into another prime (768474913) 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, 384222456 + 384222457.

It is an arithmetic number, because the mean of its divisors is an integer number (384222457).

Almost surely, 2^768444913 is an apocalyptic number.

It is an amenable number.

768444913 is a deficient number, since it is larger than the sum of its proper divisors (1).

768444913 is an equidigital number, since it uses as much as digits as its factorization.

768444913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 46.

The square root of 768444913 is about 27720.8389663805. The cubic root of 768444913 is about 915.9481995745.

Subtracting from 768444913 its sum of digits (46), we obtain a palindrome (768444867).

The spelling of 768444913 in words is "seven hundred sixty-eight million, four hundred forty-four thousand, nine hundred thirteen".