523120109 has 2 divisors, whose sum is σ = 523120110. Its totient is φ = 523120108.

The previous prime is 523120063. The next prime is 523120153. The reversal of 523120109 is 901021325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268238884 + 254881225 = 16378^2 + 15965^2 .

It is a cyclic number.

It is not a de Polignac number, because 523120109 - 2²⁰ = 522071533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523122109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261560054 + 261560055.

It is an arithmetic number, because the mean of its divisors is an integer number (261560055).

Almost surely, 2^523120109 is an apocalyptic number.

It is an amenable number.

523120109 is a deficient number, since it is larger than the sum of its proper divisors (1).

523120109 is an equidigital number, since it uses as much as digits as its factorization.

523120109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 523120109 is about 22871.8191012433. The cubic root of 523120109 is about 805.7502920833.

The spelling of 523120109 in words is "five hundred twenty-three million, one hundred twenty thousand, one hundred nine".