3633641 has 4 divisors (see below), whose sum is σ = 3963984. Its totient is φ = 3303300.

The previous prime is 3633583. The next prime is 3633647. The reversal of 3633641 is 1463363.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1463363 = 11 ⋅133033.

It is not a de Polignac number, because 3633641 - 2⁶ = 3633577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3633641.

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, 165155 + ... + 165176.

It is an arithmetic number, because the mean of its divisors is an integer number (990996).

Almost surely, 2^3633641 is an apocalyptic number.

It is an amenable number.

3633641 is a deficient number, since it is larger than the sum of its proper divisors (330343).

3633641 is a wasteful number, since it uses less digits than its factorization.

3633641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330342.

The product of its digits is 3888, while the sum is 26.

The square root of 3633641 is about 1906.2111635388. The cubic root of 3633641 is about 153.7378036903.

It can be divided in two parts, 363 and 3641, that added together give a palindrome (4004).

The spelling of 3633641 in words is "three million, six hundred thirty-three thousand, six hundred forty-one".