561118027 has 2 divisors, whose sum is σ = 561118028. Its totient is φ = 561118026.

The previous prime is 561118003. The next prime is 561118043. The reversal of 561118027 is 720811165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561118027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561118027.

It is not a weakly prime, because it can be changed into another prime (561110027) 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, 280559013 + 280559014.

It is an arithmetic number, because the mean of its divisors is an integer number (280559014).

Almost surely, 2^561118027 is an apocalyptic number.

561118027 is a deficient number, since it is larger than the sum of its proper divisors (1).

561118027 is an equidigital number, since it uses as much as digits as its factorization.

561118027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 561118027 is about 23687.9299855433. The cubic root of 561118027 is about 824.8052320144.

The spelling of 561118027 in words is "five hundred sixty-one million, one hundred eighteen thousand, twenty-seven".