473665821 has 8 divisors (see below), whose sum is σ = 631666080. Its totient is φ = 315721392.

The previous prime is 473665807. The next prime is 473665853. The reversal of 473665821 is 128566374.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 473665821 - 2¹⁴ = 473649437 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (473665721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13635 + ... + 33663.

It is an arithmetic number, because the mean of its divisors is an integer number (78958260).

Almost surely, 2^473665821 is an apocalyptic number.

It is an amenable number.

473665821 is a deficient number, since it is larger than the sum of its proper divisors (158000259).

473665821 is a wasteful number, since it uses less digits than its factorization.

473665821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27915.

The product of its digits is 241920, while the sum is 42.

The square root of 473665821 is about 21763.8650289878. The cubic root of 473665821 is about 779.5141731371.

The spelling of 473665821 in words is "four hundred seventy-three million, six hundred sixty-five thousand, eight hundred twenty-one".