768388889 has 2 divisors, whose sum is σ = 768388890. Its totient is φ = 768388888.

The previous prime is 768388883. The next prime is 768388903. The reversal of 768388889 is 988883867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411481225 + 356907664 = 20285^2 + 18892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-768388889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (768388883) 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, 384194444 + 384194445.

It is an arithmetic number, because the mean of its divisors is an integer number (384194445).

Almost surely, 2^768388889 is an apocalyptic number.

It is an amenable number.

768388889 is a deficient number, since it is larger than the sum of its proper divisors (1).

768388889 is an equidigital number, since it uses as much as digits as its factorization.

768388889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37158912, while the sum is 65.

The square root of 768388889 is about 27719.8284446351. The cubic root of 768388889 is about 915.9259397576.

The spelling of 768388889 in words is "seven hundred sixty-eight million, three hundred eighty-eight thousand, eight hundred eighty-nine".