3291 has 4 divisors (see below), whose sum is σ = 4392. Its totient is φ = 2192.

The previous prime is 3271. The next prime is 3299. The reversal of 3291 is 1923.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1923 = 3 ⋅641.

It is a cyclic number.

It is not a de Polignac number, because 3291 - 2⁵ = 3259 is a prime.

It is a D-number.

It is a plaindrome in base 9.

It is a nialpdrome in base 8 and base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 3291.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 3291.

It is not an unprimeable number, because it can be changed into a prime (3299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546 + ... + 551.

It is an arithmetic number, because the mean of its divisors is an integer number (1098).

3291 is a deficient number, since it is larger than the sum of its proper divisors (1101).

3291 is a wasteful number, since it uses less digits than its factorization.

3291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100.

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

The square root of 3291 is about 57.3672380371. The cubic root of 3291 is about 14.8745086107.

The spelling of 3291 in words is "three thousand, two hundred ninety-one".