573509 has 2 divisors, whose sum is σ = 573510. Its totient is φ = 573508.

The previous prime is 573497. The next prime is 573511. The reversal of 573509 is 905375.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 448900 + 124609 = 670^2 + 353^2 .

It is a cyclic number.

It is not a de Polignac number, because 573509 - 2⁴ = 573493 is a prime.

It is a super-3 number, since 3×573509³ = 565902962625333687, which contains 333 as substring.

Together with 573511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (573569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286754 + 286755.

It is an arithmetic number, because the mean of its divisors is an integer number (286755).

2⁵⁷³⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

573509 is a deficient number, since it is larger than the sum of its proper divisors (1).

573509 is an equidigital number, since it uses as much as digits as its factorization.

573509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4725, while the sum is 29.

The square root of 573509 is about 757.3037699629. The cubic root of 573509 is about 83.0832377327.

The spelling of 573509 in words is "five hundred seventy-three thousand, five hundred nine".