3631289 has 4 divisors (see below), whose sum is σ = 3672180. Its totient is φ = 3590400.

The previous prime is 3631249. The next prime is 3631321. The reversal of 3631289 is 9821363.

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 2274064 + 1357225 = 1508^2 + 1165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3631289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3631219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20312 + ... + 20489.

It is an arithmetic number, because the mean of its divisors is an integer number (918045).

Almost surely, 2^3631289 is an apocalyptic number.

It is an amenable number.

3631289 is a deficient number, since it is larger than the sum of its proper divisors (40891).

3631289 is an equidigital number, since it uses as much as digits as its factorization.

3631289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40890.

The product of its digits is 7776, while the sum is 32.

The square root of 3631289 is about 1905.5941330724. The cubic root of 3631289 is about 153.7046258245.

The spelling of 3631289 in words is "three million, six hundred thirty-one thousand, two hundred eighty-nine".