475539809 has 4 divisors (see below), whose sum is σ = 500568240. Its totient is φ = 450511380.

The previous prime is 475539769. The next prime is 475539811. The reversal of 475539809 is 908935574.

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-475539809 is a prime.

It is a super-2 number, since 2×475539809² = 452276219887512962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (475539829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12514187 + ... + 12514224.

It is an arithmetic number, because the mean of its divisors is an integer number (125142060).

Almost surely, 2^475539809 is an apocalyptic number.

It is an amenable number.

475539809 is a deficient number, since it is larger than the sum of its proper divisors (25028431).

475539809 is a wasteful number, since it uses less digits than its factorization.

475539809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25028430.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 475539809 is about 21806.8752690522. The cubic root of 475539809 is about 780.5408308112.

The spelling of 475539809 in words is "four hundred seventy-five million, five hundred thirty-nine thousand, eight hundred nine".