768861 has 6 divisors (see below), whose sum is σ = 1110590. Its totient is φ = 512568.

The previous prime is 768857. The next prime is 768869. The reversal of 768861 is 168867.

768861 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 416025 + 352836 = 645^2 + 594^2 .

It is not a de Polignac number, because 768861 - 2² = 768857 is a prime.

It is a super-2 number, since 2×768861² = 1182294474642, which contains 22 as substring.

It is a Duffinian number.

768861 is strictly pandigital in base 7.

768861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42706 + ... + 42723.

2⁷⁶⁸⁸⁶¹ is an apocalyptic number.

It is an amenable number.

768861 is a deficient number, since it is larger than the sum of its proper divisors (341729).

768861 is a wasteful number, since it uses less digits than its factorization.

768861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85435 (or 85432 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 768861 is about 876.8471930730. The cubic root of 768861 is about 91.6113488097.

The spelling of 768861 in words is "seven hundred sixty-eight thousand, eight hundred sixty-one".