91679 has 6 divisors (see below), whose sum is σ = 106704. Its totient is φ = 78540.

The previous prime is 91673. The next prime is 91691. The reversal of 91679 is 97619.

It is not a de Polignac number, because 91679 - 2⁸ = 91423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 887 + ... + 984.

It is an arithmetic number, because the mean of its divisors is an integer number (17784).

2⁹¹⁶⁷⁹ is an apocalyptic number.

91679 is a deficient number, since it is larger than the sum of its proper divisors (15025).

91679 is a wasteful number, since it uses less digits than its factorization.

91679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885 (or 1878 counting only the distinct ones).

The product of its digits is 3402, while the sum is 32.

The square root of 91679 is about 302.7854025544. The cubic root of 91679 is about 45.0910092320.

The spelling of 91679 in words is "ninety-one thousand, six hundred seventy-nine".