91204 has 9 divisors (see below), whose sum is σ = 160671. Its totient is φ = 45300.

The previous prime is 91199. The next prime is 91229. The reversal of 91204 is 40219.

91204 = T₃₀₁ + T₃₀₂.

The square root of 91204 is 302.

It is a perfect power (a square), and thus also a powerful number.

91204 is nontrivially palindromic in base 12.

It is a Duffinian number.

It is an unprimeable number.

91204 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 2 ways as a sum of consecutive naturals, for example, 529 + ... + 679.

2⁹¹²⁰⁴ is an apocalyptic number.

91204 is the 302-nd square number.

It is an amenable number.

91204 is a deficient number, since it is larger than the sum of its proper divisors (69467).

91204 is a wasteful number, since it uses less digits than its factorization.

91204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The cubic root of 91204 is about 45.0130003591.

Multiplying 91204 by its sum of digits (16), we get a square (1459264 = 1208²).

The spelling of 91204 in words is "ninety-one thousand, two hundred four".