56543647 has 2 divisors, whose sum is σ = 56543648. Its totient is φ = 56543646.

The previous prime is 56543629. The next prime is 56543651. The reversal of 56543647 is 74634565.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56543647 is a prime.

It is a super-3 number, since 3×56543647³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56543687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28271823 + 28271824.

It is an arithmetic number, because the mean of its divisors is an integer number (28271824).

Almost surely, 2^56543647 is an apocalyptic number.

56543647 is a deficient number, since it is larger than the sum of its proper divisors (1).

56543647 is an equidigital number, since it uses as much as digits as its factorization.

56543647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 40.

The square root of 56543647 is about 7519.5509839351. The cubic root of 56543647 is about 383.8202984951.

The spelling of 56543647 in words is "fifty-six million, five hundred forty-three thousand, six hundred forty-seven".