3609218 has 4 divisors (see below), whose sum is σ = 5413830. Its totient is φ = 1804608.

The previous prime is 3609211. The next prime is 3609241. The reversal of 3609218 is 8129063.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8129063 = 1787 ⋅4549.

It can be written as a sum of positive squares in only one way, i.e., 3598609 + 10609 = 1897^2 + 103^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3609211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902303 + ... + 902306.

Almost surely, 2^3609218 is an apocalyptic number.

3609218 is a deficient number, since it is larger than the sum of its proper divisors (1804612).

3609218 is a wasteful number, since it uses less digits than its factorization.

3609218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804611.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 3609218 is about 1899.7941993806. The cubic root of 3609218 is about 153.3925868452.

The spelling of 3609218 in words is "three million, six hundred nine thousand, two hundred eighteen".