3609681 has 8 divisors (see below), whose sum is σ = 4930464. Its totient is φ = 2347680.

The previous prime is 3609673. The next prime is 3609703. The reversal of 3609681 is 1869063.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3609681 - 2³ = 3609673 is a prime.

It is a super-2 number, since 2×3609681² = 26059593843522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3609611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14551 + ... + 14796.

It is an arithmetic number, because the mean of its divisors is an integer number (616308).

Almost surely, 2^3609681 is an apocalyptic number.

It is an amenable number.

3609681 is a deficient number, since it is larger than the sum of its proper divisors (1320783).

3609681 is a wasteful number, since it uses less digits than its factorization.

3609681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29391.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 3609681 is about 1899.9160507770. The cubic root of 3609681 is about 153.3991457666.

The spelling of 3609681 in words is "three million, six hundred nine thousand, six hundred eighty-one".