56567639 has 2 divisors, whose sum is σ = 56567640. Its totient is φ = 56567638.

The previous prime is 56567633. The next prime is 56567663. The reversal of 56567639 is 93676565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56567639 - 2⁸ = 56567383 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56567593 and 56567602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56567633) 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, 28283819 + 28283820.

It is an arithmetic number, because the mean of its divisors is an integer number (28283820).

Almost surely, 2^56567639 is an apocalyptic number.

56567639 is a deficient number, since it is larger than the sum of its proper divisors (1).

56567639 is an equidigital number, since it uses as much as digits as its factorization.

56567639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 47.

The square root of 56567639 is about 7521.1461227661. The cubic root of 56567639 is about 383.8745770036.

The spelling of 56567639 in words is "fifty-six million, five hundred sixty-seven thousand, six hundred thirty-nine".