484721821 has 4 divisors (see below), whose sum is σ = 485192092. Its totient is φ = 484251552.

The previous prime is 484721819. The next prime is 484721837. The reversal of 484721821 is 128127484.

It is a happy number.

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 465264900 + 19456921 = 21570^2 + 4411^2 .

It is a cyclic number.

It is not a de Polignac number, because 484721821 - 2¹ = 484721819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (484761821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233586 + ... + 235651.

It is an arithmetic number, because the mean of its divisors is an integer number (121298023).

Almost surely, 2^484721821 is an apocalyptic number.

It is an amenable number.

484721821 is a deficient number, since it is larger than the sum of its proper divisors (470271).

484721821 is a wasteful number, since it uses less digits than its factorization.

484721821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470270.

The product of its digits is 28672, while the sum is 37.

The square root of 484721821 is about 22016.3989108119. The cubic root of 484721821 is about 785.5325586849.

The spelling of 484721821 in words is "four hundred eighty-four million, seven hundred twenty-one thousand, eight hundred twenty-one".