3633649 has 4 divisors (see below), whose sum is σ = 3643380. Its totient is φ = 3623920.

The previous prime is 3633647. The next prime is 3633653. The reversal of 3633649 is 9463363.

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 970225 + 2663424 = 985^2 + 1632^2 .

It is a cyclic number.

It is not a de Polignac number, because 3633649 - 2¹ = 3633647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3633647) 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, 4282 + ... + 5059.

It is an arithmetic number, because the mean of its divisors is an integer number (910845).

Almost surely, 2^3633649 is an apocalyptic number.

It is an amenable number.

3633649 is a deficient number, since it is larger than the sum of its proper divisors (9731).

3633649 is an equidigital number, since it uses as much as digits as its factorization.

3633649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9730.

The product of its digits is 34992, while the sum is 34.

The square root of 3633649 is about 1906.2132619411. The cubic root of 3633649 is about 153.7379165157.

The spelling of 3633649 in words is "three million, six hundred thirty-three thousand, six hundred forty-nine".