523653 has 16 divisors (see below), whose sum is σ = 779520. Its totient is φ = 310464.

The previous prime is 523639. The next prime is 523657. The reversal of 523653 is 356325.

It is not a de Polignac number, because 523653 - 2⁴ = 523637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523657) 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 15 ways as a sum of consecutive naturals, for example, 900 + ... + 1362.

It is an arithmetic number, because the mean of its divisors is an integer number (48720).

2⁵²³⁶⁵³ is an apocalyptic number.

It is an amenable number.

523653 is a deficient number, since it is larger than the sum of its proper divisors (255867).

523653 is a wasteful number, since it uses less digits than its factorization.

523653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508.

The product of its digits is 2700, while the sum is 24.

The square root of 523653 is about 723.6387220153. The cubic root of 523653 is about 80.6023799292.

Adding to 523653 its reverse (356325), we get a palindrome (879978).

It can be divided in two parts, 523 and 653, that added together give a triangular number (1176 = T₄₈).

The spelling of 523653 in words is "five hundred twenty-three thousand, six hundred fifty-three".