76891 has 4 divisors (see below), whose sum is σ = 81432. Its totient is φ = 72352.

The previous prime is 76883. The next prime is 76907. The reversal of 76891 is 19867.

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

It is not a de Polignac number, because 76891 - 2³ = 76883 is a prime.

It is a Duffinian 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, 2245 + ... + 2278.

It is an arithmetic number, because the mean of its divisors is an integer number (20358).

2⁷⁶⁸⁹¹ is an apocalyptic number.

76891 is a deficient number, since it is larger than the sum of its proper divisors (4541).

76891 is a wasteful number, since it uses less digits than its factorization.

76891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4540.

The product of its digits is 3024, while the sum is 31.

The square root of 76891 is about 277.2922645874. The cubic root of 76891 is about 42.5231246703.

The spelling of 76891 in words is "seventy-six thousand, eight hundred ninety-one".