476509 has 4 divisors (see below), whose sum is σ = 519840. Its totient is φ = 433180.

The previous prime is 476507. The next prime is 476513. The reversal of 476509 is 905674.

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 not a de Polignac number, because 476509 - 2¹ = 476507 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (476507) 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, 21649 + ... + 21670.

It is an arithmetic number, because the mean of its divisors is an integer number (129960).

2⁴⁷⁶⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

476509 is a deficient number, since it is larger than the sum of its proper divisors (43331).

476509 is a wasteful number, since it uses less digits than its factorization.

476509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43330.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 476509 is about 690.2963131873. The cubic root of 476509 is about 78.1070740738.

It can be divided in two parts, 47 and 6509, that added together give a palindrome (6556).

The spelling of 476509 in words is "four hundred seventy-six thousand, five hundred nine".