91804 has 12 divisors (see below), whose sum is σ = 163800. Its totient is φ = 45008.

The previous prime is 91801. The next prime is 91807. The reversal of 91804 is 40819.

It is an interprime number because it is at equal distance from previous prime (91801) and next prime (91807).

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91801) 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, 42 + ... + 430.

It is an arithmetic number, because the mean of its divisors is an integer number (13650).

2⁹¹⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

91804 is a deficient number, since it is larger than the sum of its proper divisors (71996).

91804 is a wasteful number, since it uses less digits than its factorization.

91804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 91804 is about 302.9917490626. The cubic root of 91804 is about 45.1114930813. Note that the first 3 decimals are identical.

The spelling of 91804 in words is "ninety-one thousand, eight hundred four".