523573 has 2 divisors, whose sum is σ = 523574. Its totient is φ = 523572.

The previous prime is 523571. The next prime is 523577. The reversal of 523573 is 375325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380689 + 142884 = 617^2 + 378^2 .

It is a cyclic number.

It is not a de Polignac number, because 523573 - 2¹ = 523571 is a prime.

Together with 523571, it forms a pair of twin primes.

523573 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261786 + 261787.

It is an arithmetic number, because the mean of its divisors is an integer number (261787).

2⁵²³⁵⁷³ is an apocalyptic number.

It is an amenable number.

523573 is a deficient number, since it is larger than the sum of its proper divisors (1).

523573 is an equidigital number, since it uses as much as digits as its factorization.

523573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 25.

The square root of 523573 is about 723.5834437022. The cubic root of 523573 is about 80.5982750997.

Adding to 523573 its reverse (375325), we get a palindrome (898898).

The spelling of 523573 in words is "five hundred twenty-three thousand, five hundred seventy-three".