91345 has 4 divisors (see below), whose sum is σ = 109620. Its totient is φ = 73072.

The previous prime is 91331. The next prime is 91367. The reversal of 91345 is 54319.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49729 + 41616 = 223^2 + 204^2 .

It is a cyclic number.

It is not a de Polignac number, because 91345 - 2⁹ = 90833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9130 + ... + 9139.

It is an arithmetic number, because the mean of its divisors is an integer number (27405).

2⁹¹³⁴⁵ is an apocalyptic number.

It is an amenable number.

91345 is a deficient number, since it is larger than the sum of its proper divisors (18275).

91345 is a wasteful number, since it uses less digits than its factorization.

91345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18274.

The product of its digits is 540, while the sum is 22.

The square root of 91345 is about 302.2333535532. The cubic root of 91345 is about 45.0361848874.

The spelling of 91345 in words is "ninety-one thousand, three hundred forty-five".