477339721 has 4 divisors (see below), whose sum is σ = 479197332. Its totient is φ = 475482112.

The previous prime is 477339713. The next prime is 477339727. The reversal of 477339721 is 127933774.

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 369408400 + 107931321 = 19220^2 + 10389^2 .

It is a cyclic number.

It is not a de Polignac number, because 477339721 - 2³ = 477339713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (477339727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 928420 + ... + 928933.

It is an arithmetic number, because the mean of its divisors is an integer number (119799333).

Almost surely, 2^477339721 is an apocalyptic number.

It is an amenable number.

477339721 is a deficient number, since it is larger than the sum of its proper divisors (1857611).

477339721 is a wasteful number, since it uses less digits than its factorization.

477339721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857610.

The product of its digits is 222264, while the sum is 43.

The square root of 477339721 is about 21848.1056615900. The cubic root of 477339721 is about 781.5243699272.

The spelling of 477339721 in words is "four hundred seventy-seven million, three hundred thirty-nine thousand, seven hundred twenty-one".