768857 has 2 divisors, whose sum is σ = 768858. Its totient is φ = 768856.

The previous prime is 768853. The next prime is 768869. The reversal of 768857 is 758867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 737881 + 30976 = 859^2 + 176^2 .

It is an emirp because it is prime and its reverse (758867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 768857 - 2² = 768853 is a prime.

It is a super-2 number, since 2×768857² = 1182282172898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (768851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384428 + 384429.

It is an arithmetic number, because the mean of its divisors is an integer number (384429).

2⁷⁶⁸⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

768857 is a deficient number, since it is larger than the sum of its proper divisors (1).

768857 is an equidigital number, since it uses as much as digits as its factorization.

768857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 41.

The square root of 768857 is about 876.8449121709. The cubic root of 768857 is about 91.6111899400.

The spelling of 768857 in words is "seven hundred sixty-eight thousand, eight hundred fifty-seven".