76691 has 4 divisors (see below), whose sum is σ = 78192. Its totient is φ = 75192.

The previous prime is 76679. The next prime is 76697. The reversal of 76691 is 19667.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19667 = 71 ⋅277.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76691 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76697) 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, 671 + ... + 776.

It is an arithmetic number, because the mean of its divisors is an integer number (19548).

2⁷⁶⁶⁹¹ is an apocalyptic number.

76691 is a deficient number, since it is larger than the sum of its proper divisors (1501).

76691 is a wasteful number, since it uses less digits than its factorization.

76691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500.

The product of its digits is 2268, while the sum is 29.

The square root of 76691 is about 276.9313994476. The cubic root of 76691 is about 42.4862239088.

It can be divided in two parts, 76 and 691, that added together give a palindrome (767).

The spelling of 76691 in words is "seventy-six thousand, six hundred ninety-one".