3633981 has 8 divisors (see below), whose sum is σ = 5218080. Its totient is φ = 2236272.

The previous prime is 3633941. The next prime is 3633983. The reversal of 3633981 is 1893363.

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

It is not a de Polignac number, because 3633981 - 2⁷ = 3633853 is a prime.

It is a super-2 number, since 2×3633981² = 26411635816722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3633983) 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, 46551 + ... + 46628.

It is an arithmetic number, because the mean of its divisors is an integer number (652260).

Almost surely, 2^3633981 is an apocalyptic number.

It is an amenable number.

3633981 is a deficient number, since it is larger than the sum of its proper divisors (1584099).

3633981 is a wasteful number, since it uses less digits than its factorization.

3633981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93195.

The product of its digits is 11664, while the sum is 33.

The square root of 3633981 is about 1906.3003435975. The cubic root of 3633981 is about 153.7425986258.

The spelling of 3633981 in words is "three million, six hundred thirty-three thousand, nine hundred eighty-one".