76813 has 4 divisors (see below), whose sum is σ = 83808. Its totient is φ = 69820.

The previous prime is 76801. The next prime is 76819. The reversal of 76813 is 31867.

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: 31867 = 11 ⋅2897.

It is a cyclic number.

It is not a de Polignac number, because 76813 - 2⁵ = 76781 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3481 + ... + 3502.

It is an arithmetic number, because the mean of its divisors is an integer number (20952).

2⁷⁶⁸¹³ is an apocalyptic number.

It is an amenable number.

76813 is a deficient number, since it is larger than the sum of its proper divisors (6995).

76813 is a wasteful number, since it uses less digits than its factorization.

76813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6994.

The product of its digits is 1008, while the sum is 25.

The square root of 76813 is about 277.1515830732. The cubic root of 76813 is about 42.5087409933.

The spelling of 76813 in words is "seventy-six thousand, eight hundred thirteen".