76805 has 4 divisors (see below), whose sum is σ = 92172. Its totient is φ = 61440.

The previous prime is 76801. The next prime is 76819. The reversal of 76805 is 50867.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43681 + 33124 = 209^2 + 182^2 .

It is not a de Polignac number, because 76805 - 2² = 76801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76801) 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, 7676 + ... + 7685.

It is an arithmetic number, because the mean of its divisors is an integer number (23043).

2⁷⁶⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

76805 is a deficient number, since it is larger than the sum of its proper divisors (15367).

76805 is a wasteful number, since it uses less digits than its factorization.

76805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15366.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 76805 is about 277.1371501622. The cubic root of 76805 is about 42.5072651940.

The spelling of 76805 in words is "seventy-six thousand, eight hundred five".