561300643 has 2 divisors, whose sum is σ = 561300644. Its totient is φ = 561300642.

The previous prime is 561300637. The next prime is 561300647. The reversal of 561300643 is 346003165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561300643 is a prime.

It is not a weakly prime, because it can be changed into another prime (561300647) 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, 280650321 + 280650322.

It is an arithmetic number, because the mean of its divisors is an integer number (280650322).

Almost surely, 2^561300643 is an apocalyptic number.

561300643 is a deficient number, since it is larger than the sum of its proper divisors (1).

561300643 is an equidigital number, since it uses as much as digits as its factorization.

561300643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 561300643 is about 23691.7842932946. The cubic root of 561300643 is about 824.8946999979.

The spelling of 561300643 in words is "five hundred sixty-one million, three hundred thousand, six hundred forty-three".