91636 has 12 divisors (see below), whose sum is σ = 165760. Its totient is φ = 44280.

The previous prime is 91631. The next prime is 91639. The reversal of 91636 is 63619.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 91636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91631) by changing a digit.

91636 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246 + ... + 493.

2⁹¹⁶³⁶ is an apocalyptic number.

It is an amenable number.

91636 is a deficient number, since it is larger than the sum of its proper divisors (74124).

91636 is a wasteful number, since it uses less digits than its factorization.

91636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 772 counting only the distinct ones).

The product of its digits is 972, while the sum is 25.

The square root of 91636 is about 302.7143868401. The cubic root of 91636 is about 45.0839584839.

It can be divided in two parts, 91 and 636, that added together give a palindrome (727).

The spelling of 91636 in words is "ninety-one thousand, six hundred thirty-six".