768884861 has 2 divisors, whose sum is σ = 768884862. Its totient is φ = 768884860.

The previous prime is 768884839. The next prime is 768884881. The reversal of 768884861 is 168488867.

768884861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620508100 + 148376761 = 24910^2 + 12181^2 .

It is an emirp because it is prime and its reverse (168488867) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-768884861 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 768884797 and 768884806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (768884881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384442430 + 384442431.

It is an arithmetic number, because the mean of its divisors is an integer number (384442431).

Almost surely, 2^768884861 is an apocalyptic number.

It is an amenable number.

768884861 is a deficient number, since it is larger than the sum of its proper divisors (1).

768884861 is an equidigital number, since it uses as much as digits as its factorization.

768884861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4128768, while the sum is 56.

The square root of 768884861 is about 27728.7731607441. The cubic root of 768884861 is about 916.1229649540.

The spelling of 768884861 in words is "seven hundred sixty-eight million, eight hundred eighty-four thousand, eight hundred sixty-one".