3840647 has 2 divisors, whose sum is σ = 3840648. Its totient is φ = 3840646.

The previous prime is 3840601. The next prime is 3840649. The reversal of 3840647 is 7460483.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3840647 - 2⁸ = 3840391 is a prime.

Together with 3840649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3840649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1920323 + 1920324.

It is an arithmetic number, because the mean of its divisors is an integer number (1920324).

Almost surely, 2^3840647 is an apocalyptic number.

3840647 is a deficient number, since it is larger than the sum of its proper divisors (1).

3840647 is an equidigital number, since it uses as much as digits as its factorization.

3840647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 3840647 is about 1959.7568726758. The cubic root of 3840647 is about 156.6035000118.

The spelling of 3840647 in words is "three million, eight hundred forty thousand, six hundred forty-seven".