560644391 has 2 divisors, whose sum is σ = 560644392. Its totient is φ = 560644390.

The previous prime is 560644379. The next prime is 560644429. The reversal of 560644391 is 193446065.

It is an a-pointer prime, because the next prime (560644429) can be obtained adding 560644391 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 560644391 - 2¹⁰ = 560643367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (560644361) 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, 280322195 + 280322196.

It is an arithmetic number, because the mean of its divisors is an integer number (280322196).

Almost surely, 2^560644391 is an apocalyptic number.

560644391 is a deficient number, since it is larger than the sum of its proper divisors (1).

560644391 is an equidigital number, since it uses as much as digits as its factorization.

560644391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 560644391 is about 23677.9304627748. The cubic root of 560644391 is about 824.5730958144.

The spelling of 560644391 in words is "five hundred sixty million, six hundred forty-four thousand, three hundred ninety-one".