476838721 has 8 divisors (see below), whose sum is σ = 498968424. Its totient is φ = 455195520.

The previous prime is 476838709. The next prime is 476838749. The reversal of 476838721 is 127838674.

It can be written as a sum of positive squares in 4 ways, for example, as 139712400 + 337126321 = 11820^2 + 18361^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 476838721 - 2²¹ = 474741569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (476838751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119620 + ... + 123541.

It is an arithmetic number, because the mean of its divisors is an integer number (62371053).

Almost surely, 2^476838721 is an apocalyptic number.

It is an amenable number.

476838721 is a deficient number, since it is larger than the sum of its proper divisors (22129703).

476838721 is a wasteful number, since it uses less digits than its factorization.

476838721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243251.

The product of its digits is 451584, while the sum is 46.

The square root of 476838721 is about 21836.6371266274. The cubic root of 476838721 is about 781.2508534945.

The spelling of 476838721 in words is "four hundred seventy-six million, eight hundred thirty-eight thousand, seven hundred twenty-one".