56005643 has 2 divisors, whose sum is σ = 56005644. Its totient is φ = 56005642.

The previous prime is 56005637. The next prime is 56005657. The reversal of 56005643 is 34650065.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56005643 - 2⁴ = 56005627 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56005613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28002821 + 28002822.

It is an arithmetic number, because the mean of its divisors is an integer number (28002822).

Almost surely, 2^56005643 is an apocalyptic number.

56005643 is a deficient number, since it is larger than the sum of its proper divisors (1).

56005643 is an equidigital number, since it uses as much as digits as its factorization.

56005643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 56005643 is about 7483.6918028470. The cubic root of 56005643 is about 382.5990869213.

The spelling of 56005643 in words is "fifty-six million, five thousand, six hundred forty-three".