768439769 has 2 divisors, whose sum is σ = 768439770. Its totient is φ = 768439768.

The previous prime is 768439747. The next prime is 768439783. The reversal of 768439769 is 967934867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 457446544 + 310993225 = 21388^2 + 17635^2 .

It is a cyclic number.

It is not a de Polignac number, because 768439769 - 2¹² = 768435673 is a prime.

It is a super-2 number, since 2×768439769² = 1180999357161546722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (768433769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384219884 + 384219885.

It is an arithmetic number, because the mean of its divisors is an integer number (384219885).

Almost surely, 2^768439769 is an apocalyptic number.

It is an amenable number.

768439769 is a deficient number, since it is larger than the sum of its proper divisors (1).

768439769 is an equidigital number, since it uses as much as digits as its factorization.

768439769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 59.

The square root of 768439769 is about 27720.7461840406. The cubic root of 768439769 is about 915.9461557723.

The spelling of 768439769 in words is "seven hundred sixty-eight million, four hundred thirty-nine thousand, seven hundred sixty-nine".