768102991 has 2 divisors, whose sum is σ = 768102992. Its totient is φ = 768102990.

The previous prime is 768102989. The next prime is 768102997. The reversal of 768102991 is 199201867.

768102991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (199201867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 768102991 - 2¹ = 768102989 is a prime.

Together with 768102989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (768102997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384051495 + 384051496.

It is an arithmetic number, because the mean of its divisors is an integer number (384051496).

Almost surely, 2^768102991 is an apocalyptic number.

768102991 is a deficient number, since it is larger than the sum of its proper divisors (1).

768102991 is an equidigital number, since it uses as much as digits as its factorization.

768102991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 768102991 is about 27714.6710426085. The cubic root of 768102991 is about 915.8123280687.

The spelling of 768102991 in words is "seven hundred sixty-eight million, one hundred two thousand, nine hundred ninety-one".