123560009 has 2 divisors, whose sum is σ = 123560010. Its totient is φ = 123560008.

The previous prime is 123559999. The next prime is 123560033. The reversal of 123560009 is 900065321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81504784 + 42055225 = 9028^2 + 6485^2 .

It is a cyclic number.

It is not a de Polignac number, because 123560009 - 2⁸ = 123559753 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123560009.

It is not a weakly prime, because it can be changed into another prime (123560089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61780004 + 61780005.

It is an arithmetic number, because the mean of its divisors is an integer number (61780005).

Almost surely, 2^123560009 is an apocalyptic number.

It is an amenable number.

123560009 is a deficient number, since it is larger than the sum of its proper divisors (1).

123560009 is an equidigital number, since it uses as much as digits as its factorization.

123560009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 123560009 is about 11115.7549901030. The cubic root of 123560009 is about 498.0725917417.

The spelling of 123560009 in words is "one hundred twenty-three million, five hundred sixty thousand, nine".