509606 has 4 divisors (see below), whose sum is σ = 764412. Its totient is φ = 254802.

The previous prime is 509603. The next prime is 509623. The reversal of 509606 is 606905.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127400 + ... + 127403.

It is an arithmetic number, because the mean of its divisors is an integer number (191103).

2⁵⁰⁹⁶⁰⁶ is an apocalyptic number.

509606 is a deficient number, since it is larger than the sum of its proper divisors (254806).

509606 is a wasteful number, since it uses less digits than its factorization.

509606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254805.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 509606 is about 713.8669343792. The cubic root of 509606 is about 79.8751176564.

The spelling of 509606 in words is "five hundred nine thousand, six hundred six".