56966647 has 2 divisors, whose sum is σ = 56966648. Its totient is φ = 56966646.

The previous prime is 56966629. The next prime is 56966659. The reversal of 56966647 is 74666965.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56966647 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56966647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56960647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28483323 + 28483324.

It is an arithmetic number, because the mean of its divisors is an integer number (28483324).

Almost surely, 2^56966647 is an apocalyptic number.

56966647 is a deficient number, since it is larger than the sum of its proper divisors (1).

56966647 is an equidigital number, since it uses as much as digits as its factorization.

56966647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 49.

The square root of 56966647 is about 7547.6252556682. The cubic root of 56966647 is about 384.7750347052.

The spelling of 56966647 in words is "fifty-six million, nine hundred sixty-six thousand, six hundred forty-seven".