523520369 has 2 divisors, whose sum is σ = 523520370. Its totient is φ = 523520368.

The previous prime is 523520353. The next prime is 523520377. The reversal of 523520369 is 963025325.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383689744 + 139830625 = 19588^2 + 11825^2 .

It is a cyclic number.

It is not a de Polignac number, because 523520369 - 2⁴ = 523520353 is a prime.

It is a super-2 number, since 2×523520369² = 548147153515792322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (523520869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261760184 + 261760185.

It is an arithmetic number, because the mean of its divisors is an integer number (261760185).

Almost surely, 2^523520369 is an apocalyptic number.

It is an amenable number.

523520369 is a deficient number, since it is larger than the sum of its proper divisors (1).

523520369 is an equidigital number, since it uses as much as digits as its factorization.

523520369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 523520369 is about 22880.5674973328. The cubic root of 523520369 is about 805.9557435570.

The spelling of 523520369 in words is "five hundred twenty-three million, five hundred twenty thousand, three hundred sixty-nine".