523287 has 8 divisors (see below), whose sum is σ = 775280. Its totient is φ = 348840.

The previous prime is 523261. The next prime is 523297. The reversal of 523287 is 782325.

It is not a de Polignac number, because 523287 - 2⁸ = 523031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 19381 = 523287 / (5 + 2 + 3 + 2 + 8 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 523287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9664 + ... + 9717.

It is an arithmetic number, because the mean of its divisors is an integer number (96910).

2⁵²³²⁸⁷ is an apocalyptic number.

523287 is a deficient number, since it is larger than the sum of its proper divisors (251993).

523287 is a wasteful number, since it uses less digits than its factorization.

523287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19390 (or 19384 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 523287 is about 723.3857891886. The cubic root of 523287 is about 80.5835969140.

The spelling of 523287 in words is "five hundred twenty-three thousand, two hundred eighty-seven".