3647663 has 4 divisors (see below), whose sum is σ = 3663960. Its totient is φ = 3631368.

The previous prime is 3647641. The next prime is 3647671. The reversal of 3647663 is 3667463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3667463 = 1109 ⋅3307.

It is a cyclic number.

It is not a de Polignac number, because 3647663 - 2⁶ = 3647599 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 3⁸ + 6² + 4⁹ + 7 + 6⁸ + 6⁸ + 3⁹ .

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3647263) 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, 7808 + ... + 8261.

It is an arithmetic number, because the mean of its divisors is an integer number (915990).

Almost surely, 2^3647663 is an apocalyptic number.

3647663 is a deficient number, since it is larger than the sum of its proper divisors (16297).

3647663 is a wasteful number, since it uses less digits than its factorization.

3647663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16296.

The product of its digits is 54432, while the sum is 35.

The square root of 3647663 is about 1909.8855986682. The cubic root of 3647663 is about 153.9353048095.

The spelling of 3647663 in words is "three million, six hundred forty-seven thousand, six hundred sixty-three".