509469 has 4 divisors (see below), whose sum is σ = 679296. Its totient is φ = 339644.

The previous prime is 509449. The next prime is 509477. The reversal of 509469 is 964905.

It is a happy number.

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 not a de Polignac number, because 509469 - 2⁹ = 508957 is a prime.

It is a super-2 number, since 2×509469² = 519117323922, which contains 22 as substring.

It is a D-number.

509469 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509429) 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 in 3 ways as a sum of consecutive naturals, for example, 84909 + ... + 84914.

It is an arithmetic number, because the mean of its divisors is an integer number (169824).

2⁵⁰⁹⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

509469 is a deficient number, since it is larger than the sum of its proper divisors (169827).

509469 is a wasteful number, since it uses less digits than its factorization.

509469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169826.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 509469 is about 713.7709716709. The cubic root of 509469 is about 79.8679592688.

The spelling of 509469 in words is "five hundred nine thousand, four hundred sixty-nine".