561112889 has 2 divisors, whose sum is σ = 561112890. Its totient is φ = 561112888.

The previous prime is 561112879. The next prime is 561112939. The reversal of 561112889 is 988211165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335512489 + 225600400 = 18317^2 + 15020^2 .

It is a cyclic number.

It is not a de Polignac number, because 561112889 - 2²⁰ = 560064313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (561112859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280556444 + 280556445.

It is an arithmetic number, because the mean of its divisors is an integer number (280556445).

Almost surely, 2^561112889 is an apocalyptic number.

It is an amenable number.

561112889 is a deficient number, since it is larger than the sum of its proper divisors (1).

561112889 is an equidigital number, since it uses as much as digits as its factorization.

561112889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 41.

The square root of 561112889 is about 23687.8215334378. The cubic root of 561112889 is about 824.8027145035.

The spelling of 561112889 in words is "five hundred sixty-one million, one hundred twelve thousand, eight hundred eighty-nine".