91304 has 16 divisors (see below), whose sum is σ = 174420. Its totient is φ = 44800.

The previous prime is 91303. The next prime is 91309. The reversal of 91304 is 40319.

It can be written as a sum of positive squares in 2 ways, for example, as 91204 + 100 = 302^2 + 10^2 .

It is not an unprimeable number, because it can be changed into a prime (91303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752 + ... + 864.

2⁹¹³⁰⁴ is an apocalyptic number.

It is an amenable number.

91304 is a deficient number, since it is larger than the sum of its proper divisors (83116).

91304 is a wasteful number, since it uses less digits than its factorization.

91304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 91304 is about 302.1655175562. The cubic root of 91304 is about 45.0294457485.

The spelling of 91304 in words is "ninety-one thousand, three hundred four".