479744021 has 4 divisors (see below), whose sum is σ = 481030572. Its totient is φ = 478457472.

The previous prime is 479744017. The next prime is 479744033. The reversal of 479744021 is 120447974.

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 367680625 + 112063396 = 19175^2 + 10586^2 .

It is a cyclic number.

It is not a de Polignac number, because 479744021 - 2² = 479744017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (479744521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642716 + ... + 643461.

It is an arithmetic number, because the mean of its divisors is an integer number (120257643).

Almost surely, 2^479744021 is an apocalyptic number.

It is an amenable number.

479744021 is a deficient number, since it is larger than the sum of its proper divisors (1286551).

479744021 is a wasteful number, since it uses less digits than its factorization.

479744021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286550.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 479744021 is about 21903.0596264540. The cubic root of 479744021 is about 782.8343196091.

The spelling of 479744021 in words is "four hundred seventy-nine million, seven hundred forty-four thousand, twenty-one".