561118003 has 2 divisors, whose sum is σ = 561118004. Its totient is φ = 561118002.

The previous prime is 561117989. The next prime is 561118027. The reversal of 561118003 is 300811165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561118003 - 2¹⁷ = 560986931 is a prime.

It is not a weakly prime, because it can be changed into another prime (561118043) 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, 280559001 + 280559002.

It is an arithmetic number, because the mean of its divisors is an integer number (280559002).

Almost surely, 2^561118003 is an apocalyptic number.

561118003 is a deficient number, since it is larger than the sum of its proper divisors (1).

561118003 is an equidigital number, since it uses as much as digits as its factorization.

561118003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 561118003 is about 23687.9294789562. The cubic root of 561118003 is about 824.8052202549.

Adding to 561118003 its reverse (300811165), we get a palindrome (861929168).

The spelling of 561118003 in words is "five hundred sixty-one million, one hundred eighteen thousand, three".