523564069 has 12 divisors (see below), whose sum is σ = 609825900. Its totient is φ = 448193088.

The previous prime is 523564049. The next prime is 523564073. The reversal of 523564069 is 960465325.

It can be written as a sum of positive squares in 2 ways, for example, as 322633444 + 200930625 = 17962^2 + 14175^2 .

It is a de Polignac number, because none of the positive numbers 2^k-523564069 is a prime.

It is a super-2 number, since 2×523564069² = 548238668695673522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523564049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34177 + ... + 47065.

It is an arithmetic number, because the mean of its divisors is an integer number (50818825).

Almost surely, 2^523564069 is an apocalyptic number.

It is an amenable number.

523564069 is a deficient number, since it is larger than the sum of its proper divisors (86261831).

523564069 is a wasteful number, since it uses less digits than its factorization.

523564069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13732 (or 13725 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 523564069 is about 22881.5224362366. The cubic root of 523564069 is about 805.9781682088.

The spelling of 523564069 in words is "five hundred twenty-three million, five hundred sixty-four thousand, sixty-nine".