91633 has 4 divisors (see below), whose sum is σ = 93808. Its totient is φ = 89460.

The previous prime is 91631. The next prime is 91639. The reversal of 91633 is 33619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91633 - 2¹ = 91631 is a prime.

It is a Duffinian number.

91633 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (91631) 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, 1023 + ... + 1108.

It is an arithmetic number, because the mean of its divisors is an integer number (23452).

2⁹¹⁶³³ is an apocalyptic number.

It is an amenable number.

91633 is a deficient number, since it is larger than the sum of its proper divisors (2175).

91633 is a wasteful number, since it uses less digits than its factorization.

91633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174.

The product of its digits is 486, while the sum is 22.

The square root of 91633 is about 302.7094316337. The cubic root of 91633 is about 45.0834664889.

It can be divided in two parts, 916 and 33, that added together give a palindrome (949).

The spelling of 91633 in words is "ninety-one thousand, six hundred thirty-three".