523123169 has 2 divisors, whose sum is σ = 523123170. Its totient is φ = 523123168.

The previous prime is 523123151. The next prime is 523123189. The reversal of 523123169 is 961321325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 496754944 + 26368225 = 22288^2 + 5135^2 .

It is a cyclic number.

It is not a de Polignac number, because 523123169 - 2¹² = 523119073 is a prime.

It is a super-2 number, since 2×523123169² = 547315699889205122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (523123189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261561584 + 261561585.

It is an arithmetic number, because the mean of its divisors is an integer number (261561585).

Almost surely, 2^523123169 is an apocalyptic number.

It is an amenable number.

523123169 is a deficient number, since it is larger than the sum of its proper divisors (1).

523123169 is an equidigital number, since it uses as much as digits as its factorization.

523123169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 32.

The square root of 523123169 is about 22871.8859956935. The cubic root of 523123169 is about 805.7518631636.

The spelling of 523123169 in words is "five hundred twenty-three million, one hundred twenty-three thousand, one hundred sixty-nine".