768809 has 4 divisors (see below), whose sum is σ = 774480. Its totient is φ = 763140.

The previous prime is 768799. The next prime is 768811. The reversal of 768809 is 908867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 908867 = 433 ⋅2099.

It is a cyclic number.

It is not a de Polignac number, because 768809 - 2⁴ = 768793 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 2627 + ... + 2904.

It is an arithmetic number, because the mean of its divisors is an integer number (193620).

2⁷⁶⁸⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

768809 is a deficient number, since it is larger than the sum of its proper divisors (5671).

768809 is a wasteful number, since it uses less digits than its factorization.

768809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5670.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 768809 is about 876.8175408829. The cubic root of 768809 is about 91.6092834613.

The spelling of 768809 in words is "seven hundred sixty-eight thousand, eight hundred nine".