3956647 has 2 divisors, whose sum is σ = 3956648. Its totient is φ = 3956646.

The previous prime is 3956639. The next prime is 3956651. The reversal of 3956647 is 7466593.

It is a strong prime.

It is an emirp because it is prime and its reverse (7466593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3956647 - 2³ = 3956639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3956677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978323 + 1978324.

It is an arithmetic number, because the mean of its divisors is an integer number (1978324).

Almost surely, 2^3956647 is an apocalyptic number.

3956647 is a deficient number, since it is larger than the sum of its proper divisors (1).

3956647 is an equidigital number, since it uses as much as digits as its factorization.

3956647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The square root of 3956647 is about 1989.1322228550. The cubic root of 3956647 is about 158.1645324458.

The spelling of 3956647 in words is "three million, nine hundred fifty-six thousand, six hundred forty-seven".