3291889 has 4 divisors (see below), whose sum is σ = 3325924. Its totient is φ = 3257856.

The previous prime is 3291881. The next prime is 3291901. The reversal of 3291889 is 9881923.

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 2624400 + 667489 = 1620^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 3291889 - 2³ = 3291881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3291881) 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, 16872 + ... + 17065.

It is an arithmetic number, because the mean of its divisors is an integer number (831481).

Almost surely, 2^3291889 is an apocalyptic number.

It is an amenable number.

3291889 is a deficient number, since it is larger than the sum of its proper divisors (34035).

3291889 is an equidigital number, since it uses as much as digits as its factorization.

3291889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34034.

The product of its digits is 31104, while the sum is 40.

The square root of 3291889 is about 1814.3563597045. The cubic root of 3291889 is about 148.7584784377.

It can be divided in two parts, 329188 and 9, that multiplied together give a palindrome (2962692).

The spelling of 3291889 in words is "three million, two hundred ninety-one thousand, eight hundred eighty-nine".