523430780809 has 2 divisors, whose sum is σ = 523430780810. Its totient is φ = 523430780808.

The previous prime is 523430780779. The next prime is 523430780843. The reversal of 523430780809 is 908087034325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275700605184 + 247730175625 = 525072^2 + 497725^2 .

It is a cyclic number.

It is not a de Polignac number, because 523430780809 - 2⁵ = 523430780777 is a prime.

It is not a weakly prime, because it can be changed into another prime (523430780209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261715390404 + 261715390405.

It is an arithmetic number, because the mean of its divisors is an integer number (261715390405).

Almost surely, 2^523430780809 is an apocalyptic number.

It is an amenable number.

523430780809 is a deficient number, since it is larger than the sum of its proper divisors (1).

523430780809 is an equidigital number, since it uses as much as digits as its factorization.

523430780809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 523430780809 in words is "five hundred twenty-three billion, four hundred thirty million, seven hundred eighty thousand, eight hundred nine".