609539 has 8 divisors (see below), whose sum is σ = 733440. Its totient is φ = 494856.

The previous prime is 609533. The next prime is 609541. The reversal of 609539 is 935906.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 609539 - 2⁸ = 609283 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 609539.

It is not an unprimeable number, because it can be changed into a prime (609533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2159 + ... + 2424.

It is an arithmetic number, because the mean of its divisors is an integer number (91680).

2⁶⁰⁹⁵³⁹ is an apocalyptic number.

609539 is a deficient number, since it is larger than the sum of its proper divisors (123901).

609539 is a wasteful number, since it uses less digits than its factorization.

609539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4609.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 609539 is about 780.7297868021. The cubic root of 609539 is about 84.7878909819.

It can be divided in two parts, 6095 and 39, that multiplied together give a triangular number (237705 = T₆₈₉).

The spelling of 609539 in words is "six hundred nine thousand, five hundred thirty-nine".