523729 has 2 divisors, whose sum is σ = 523730. Its totient is φ = 523728.

The previous prime is 523717. The next prime is 523741. The reversal of 523729 is 927325.

It is a balanced prime because it is at equal distance from previous prime (523717) and next prime (523741).

It can be written as a sum of positive squares in only one way, i.e., 518400 + 5329 = 720^2 + 73^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 523697 and 523706.

It is not a weakly prime, because it can be changed into another prime (523759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261864 + 261865.

It is an arithmetic number, because the mean of its divisors is an integer number (261865).

2⁵²³⁷²⁹ is an apocalyptic number.

It is an amenable number.

523729 is a deficient number, since it is larger than the sum of its proper divisors (1).

523729 is an equidigital number, since it uses as much as digits as its factorization.

523729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 28.

The square root of 523729 is about 723.6912325018. The cubic root of 523729 is about 80.6062791300.

The spelling of 523729 in words is "five hundred twenty-three thousand, seven hundred twenty-nine".