561227839 has 2 divisors, whose sum is σ = 561227840. Its totient is φ = 561227838.

The previous prime is 561227831. The next prime is 561227861. The reversal of 561227839 is 938722165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561227839 - 2³ = 561227831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561227795 and 561227804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561227831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280613919 + 280613920.

It is an arithmetic number, because the mean of its divisors is an integer number (280613920).

Almost surely, 2^561227839 is an apocalyptic number.

561227839 is a deficient number, since it is larger than the sum of its proper divisors (1).

561227839 is an equidigital number, since it uses as much as digits as its factorization.

561227839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 561227839 is about 23690.2477614735. The cubic root of 561227839 is about 824.8590338884.

The spelling of 561227839 in words is "five hundred sixty-one million, two hundred twenty-seven thousand, eight hundred thirty-nine".