91646 has 4 divisors (see below), whose sum is σ = 137472. Its totient is φ = 45822.

The previous prime is 91639. The next prime is 91673. The reversal of 91646 is 64619.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22910 + ... + 22913.

It is an arithmetic number, because the mean of its divisors is an integer number (34368).

2⁹¹⁶⁴⁶ is an apocalyptic number.

91646 is a deficient number, since it is larger than the sum of its proper divisors (45826).

91646 is a wasteful number, since it uses less digits than its factorization.

91646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45825.

The product of its digits is 1296, while the sum is 26.

The square root of 91646 is about 302.7309036091. The cubic root of 91646 is about 45.0855983895.

It can be divided in two parts, 91 and 646, that added together give a palindrome (737).

The spelling of 91646 in words is "ninety-one thousand, six hundred forty-six".