768827861 has 2 divisors, whose sum is σ = 768827862. Its totient is φ = 768827860.

The previous prime is 768827827. The next prime is 768827887. The reversal of 768827861 is 168728867.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442302961 + 326524900 = 21031^2 + 18070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-768827861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (768827561) 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, 384413930 + 384413931.

It is an arithmetic number, because the mean of its divisors is an integer number (384413931).

Almost surely, 2^768827861 is an apocalyptic number.

It is an amenable number.

768827861 is a deficient number, since it is larger than the sum of its proper divisors (1).

768827861 is an equidigital number, since it uses as much as digits as its factorization.

768827861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1806336, while the sum is 53.

The square root of 768827861 is about 27727.7453284612. The cubic root of 768827861 is about 916.1003259773.

The spelling of 768827861 in words is "seven hundred sixty-eight million, eight hundred twenty-seven thousand, eight hundred sixty-one".