3091 has 4 divisors (see below), whose sum is σ = 3384.
Its totient is φ = 2800.
The previous prime is 3089. The next prime is 3109. The reversal of 3091 is 1903.
3091 = T18 + T19 + ... +
It is a happy number.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1903 = 11 ⋅173.
It is a cyclic number.
It is not a de Polignac number, because 3091 - 21 = 3089 is a prime.
It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a Duffinian number.
3091 is a lucky number.
It is a plaindrome in base 14.
It is a nialpdrome in base 5 and base 15.
It is not an unprimeable number, because it can be changed into a prime (3001) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130 + ... + 151.
It is an arithmetic number, because the mean of its divisors is an integer number (846).
3091 is a deficient number, since it is larger than the sum of its proper divisors (293).
3091 is a wasteful number, since it uses less digits than its factorization.
3091 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 292.
The product of its (nonzero) digits is 27, while the sum is 13.
The square root of 3091 is about 55.5967624957.
The cubic root of 3091 is about 14.5668730381.
Adding to 3091 its reverse (1903), we get a palindrome (4994).
It can be divided in two parts, 30 and 91, that added together give a palindrome (121).
The spelling of 3091 in words is "three thousand, ninety-one".