56389643 has 2 divisors, whose sum is σ = 56389644. Its totient is φ = 56389642.

The previous prime is 56389639. The next prime is 56389649. The reversal of 56389643 is 34698365.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56389643 - 2² = 56389639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56389594 and 56389603.

It is not a weakly prime, because it can be changed into another prime (56389649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28194821 + 28194822.

It is an arithmetic number, because the mean of its divisors is an integer number (28194822).

Almost surely, 2^56389643 is an apocalyptic number.

56389643 is a deficient number, since it is larger than the sum of its proper divisors (1).

56389643 is an equidigital number, since it uses as much as digits as its factorization.

56389643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 44.

The square root of 56389643 is about 7509.3037626667. The cubic root of 56389643 is about 383.4715201017.

The spelling of 56389643 in words is "fifty-six million, three hundred eighty-nine thousand, six hundred forty-three".