561630019 has 2 divisors, whose sum is σ = 561630020. Its totient is φ = 561630018.

The previous prime is 561629983. The next prime is 561630061. The reversal of 561630019 is 910036165.

561630019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561630019 - 2⁷ = 561629891 is a prime.

It is a super-2 number, since 2×561630019² = 630856556483880722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (561630079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280815009 + 280815010.

It is an arithmetic number, because the mean of its divisors is an integer number (280815010).

Almost surely, 2^561630019 is an apocalyptic number.

561630019 is a deficient number, since it is larger than the sum of its proper divisors (1).

561630019 is an equidigital number, since it uses as much as digits as its factorization.

561630019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 561630019 is about 23698.7345442747. The cubic root of 561630019 is about 825.0560201935.

The spelling of 561630019 in words is "five hundred sixty-one million, six hundred thirty thousand, nineteen".