3668647 has 2 divisors, whose sum is σ = 3668648. Its totient is φ = 3668646.

The previous prime is 3668629. The next prime is 3668671. The reversal of 3668647 is 7468663.

It is a weak prime.

It is an emirp because it is prime and its reverse (7468663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3668647 - 2¹¹ = 3666599 is a prime.

3668647 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3668747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1834323 + 1834324.

It is an arithmetic number, because the mean of its divisors is an integer number (1834324).

Almost surely, 2^3668647 is an apocalyptic number.

3668647 is a deficient number, since it is larger than the sum of its proper divisors (1).

3668647 is an equidigital number, since it uses as much as digits as its factorization.

3668647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 40.

The square root of 3668647 is about 1915.3712433886. The cubic root of 3668647 is about 154.2299230393.

The spelling of 3668647 in words is "three million, six hundred sixty-eight thousand, six hundred forty-seven".