475209949 has 4 divisors (see below), whose sum is σ = 479915100. Its totient is φ = 470504800.

The previous prime is 475209871. The next prime is 475209953. The reversal of 475209949 is 949902574.

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

It can be written as a sum of positive squares in 2 ways, for example, as 404733924 + 70476025 = 20118^2 + 8395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-475209949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (475219949) 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, 2352424 + ... + 2352625.

It is an arithmetic number, because the mean of its divisors is an integer number (119978775).

Almost surely, 2^475209949 is an apocalyptic number.

It is an amenable number.

475209949 is a deficient number, since it is larger than the sum of its proper divisors (4705151).

475209949 is a wasteful number, since it uses less digits than its factorization.

475209949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4705150.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 475209949 is about 21799.3107459846. The cubic root of 475209949 is about 780.3603140258.

The spelling of 475209949 in words is "four hundred seventy-five million, two hundred nine thousand, nine hundred forty-nine".