768429689 has 2 divisors, whose sum is σ = 768429690. Its totient is φ = 768429688.

The previous prime is 768429677. The next prime is 768429691. The reversal of 768429689 is 986924867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 479259664 + 289170025 = 21892^2 + 17005^2 .

It is an emirp because it is prime and its reverse (986924867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 768429689 - 2²⁰ = 767381113 is a prime.

Together with 768429691, 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 (768422689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384214844 + 384214845.

It is an arithmetic number, because the mean of its divisors is an integer number (384214845).

Almost surely, 2^768429689 is an apocalyptic number.

It is an amenable number.

768429689 is a deficient number, since it is larger than the sum of its proper divisors (1).

768429689 is an equidigital number, since it uses as much as digits as its factorization.

768429689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 59.

The square root of 768429689 is about 27720.5643701567. The cubic root of 768429689 is about 915.9421507837.

It can be divided in two parts, 7684 and 29689, that added together give a palindrome (37373).

The spelling of 768429689 in words is "seven hundred sixty-eight million, four hundred twenty-nine thousand, six hundred eighty-nine".