509629 has 4 divisors (see below), whose sum is σ = 516160. Its totient is φ = 503100.

The previous prime is 509623. The next prime is 509633. The reversal of 509629 is 926905.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 509629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3147 + ... + 3304.

It is an arithmetic number, because the mean of its divisors is an integer number (129040).

2⁵⁰⁹⁶²⁹ is an apocalyptic number.

It is an amenable number.

509629 is a deficient number, since it is larger than the sum of its proper divisors (6531).

509629 is an equidigital number, since it uses as much as digits as its factorization.

509629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6530.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 509629 is about 713.8830436423. The cubic root of 509629 is about 79.8763193038.

The spelling of 509629 in words is "five hundred nine thousand, six hundred twenty-nine".