320091 has 8 divisors (see below), whose sum is σ = 445440. Its totient is φ = 204072.

The previous prime is 320083. The next prime is 320101. The reversal of 320091 is 190023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320091 - 2³ = 320083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320091.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320091.

It is not an unprimeable number, because it can be changed into a prime (320011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2251 + ... + 2388.

It is an arithmetic number, because the mean of its divisors is an integer number (55680).

2³²⁰⁰⁹¹ is an apocalyptic number.

320091 is a deficient number, since it is larger than the sum of its proper divisors (125349).

320091 is a wasteful number, since it uses less digits than its factorization.

320091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4665.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 320091 is about 565.7658526281. The cubic root of 320091 is about 68.4055209114.

The spelling of 320091 in words is "three hundred twenty thousand, ninety-one".