3663491 has 4 divisors (see below), whose sum is σ = 3945312. Its totient is φ = 3381672.

The previous prime is 3663469. The next prime is 3663497. The reversal of 3663491 is 1943663.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3663491 - 2⁶ = 3663427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3663497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140891 + ... + 140916.

It is an arithmetic number, because the mean of its divisors is an integer number (986328).

Almost surely, 2^3663491 is an apocalyptic number.

3663491 is a deficient number, since it is larger than the sum of its proper divisors (281821).

3663491 is a wasteful number, since it uses less digits than its factorization.

3663491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281820.

The product of its digits is 11664, while the sum is 32.

The square root of 3663491 is about 1914.0248169760. The cubic root of 3663491 is about 154.1576364161.

The spelling of 3663491 in words is "three million, six hundred sixty-three thousand, four hundred ninety-one".