56697647 has 2 divisors, whose sum is σ = 56697648. Its totient is φ = 56697646.

The previous prime is 56697623. The next prime is 56697649. The reversal of 56697647 is 74679665.

56697647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56697647 - 2⁸ = 56697391 is a prime.

Together with 56697649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56697595 and 56697604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56697649) 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, 28348823 + 28348824.

It is an arithmetic number, because the mean of its divisors is an integer number (28348824).

Almost surely, 2^56697647 is an apocalyptic number.

56697647 is a deficient number, since it is larger than the sum of its proper divisors (1).

56697647 is an equidigital number, since it uses as much as digits as its factorization.

56697647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 50.

The square root of 56697647 is about 7529.7839942458. The cubic root of 56697647 is about 384.1684351321.

The spelling of 56697647 in words is "fifty-six million, six hundred ninety-seven thousand, six hundred forty-seven".