479821 has 2 divisors, whose sum is σ = 479822. Its totient is φ = 479820.

The previous prime is 479813. The next prime is 479833. The reversal of 479821 is 128974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 476100 + 3721 = 690^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 479821 - 2³ = 479813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (479861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239910 + 239911.

It is an arithmetic number, because the mean of its divisors is an integer number (239911).

2⁴⁷⁹⁸²¹ is an apocalyptic number.

It is an amenable number.

479821 is a deficient number, since it is larger than the sum of its proper divisors (1).

479821 is an equidigital number, since it uses as much as digits as its factorization.

479821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 479821 is about 692.6911288590. The cubic root of 479821 is about 78.2876188173.

The spelling of 479821 in words is "four hundred seventy-nine thousand, eight hundred twenty-one".