91667 has 4 divisors (see below), whose sum is σ = 94656. Its totient is φ = 88680.

The previous prime is 91639. The next prime is 91673. The reversal of 91667 is 76619.

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: 76619 = 17 ⋅4507.

It is a cyclic number.

It is not a de Polignac number, because 91667 - 2⁸ = 91411 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (91367) 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, 1448 + ... + 1509.

It is an arithmetic number, because the mean of its divisors is an integer number (23664).

2⁹¹⁶⁶⁷ is an apocalyptic number.

91667 is a deficient number, since it is larger than the sum of its proper divisors (2989).

91667 is a wasteful number, since it uses less digits than its factorization.

91667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988.

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

The square root of 91667 is about 302.7655858911. The cubic root of 91667 is about 45.0890418032.

The spelling of 91667 in words is "ninety-one thousand, six hundred sixty-seven".