3663971 has 2 divisors, whose sum is σ = 3663972. Its totient is φ = 3663970.

The previous prime is 3663949. The next prime is 3664013. The reversal of 3663971 is 1793663.

It is a weak prime.

It is an emirp because it is prime and its reverse (1793663) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3663971 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3663911) 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 as a sum of consecutive naturals, namely, 1831985 + 1831986.

It is an arithmetic number, because the mean of its divisors is an integer number (1831986).

Almost surely, 2^3663971 is an apocalyptic number.

3663971 is a deficient number, since it is larger than the sum of its proper divisors (1).

3663971 is an equidigital number, since it uses as much as digits as its factorization.

3663971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 35.

The square root of 3663971 is about 1914.1502030927. The cubic root of 3663971 is about 154.1643688319.

The spelling of 3663971 in words is "three million, six hundred sixty-three thousand, nine hundred seventy-one".