91670 has 16 divisors (see below), whose sum is σ = 168480. Its totient is φ = 35904.

The previous prime is 91639. The next prime is 91673. The reversal of 91670 is 7619.

It is a happy number.

It is a plaindrome in base 14.

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 7 ways as a sum of consecutive naturals, for example, 839 + ... + 941.

It is an arithmetic number, because the mean of its divisors is an integer number (10530).

2⁹¹⁶⁷⁰ is an apocalyptic number.

91670 is a deficient number, since it is larger than the sum of its proper divisors (76810).

91670 is a wasteful number, since it uses less digits than its factorization.

91670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 91670 is about 302.7705401785. The cubic root of 91670 is about 45.0895336765.

The spelling of 91670 in words is "ninety-one thousand, six hundred seventy".