8441724821 has 4 divisors (see below), whose sum is σ = 8459957952. Its totient is φ = 8423491692.

The previous prime is 8441724769. The next prime is 8441724839. The reversal of 8441724821 is 1284271448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8441724821 - 2¹⁴ = 8441708437 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 (8441724121) 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, 9115871 + ... + 9116796.

It is an arithmetic number, because the mean of its divisors is an integer number (2114989488).

Almost surely, 2^8441724821 is an apocalyptic number.

It is an amenable number.

8441724821 is a deficient number, since it is larger than the sum of its proper divisors (18233131).

8441724821 is a wasteful number, since it uses less digits than its factorization.

8441724821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18233130.

The product of its digits is 114688, while the sum is 41.

The square root of 8441724821 is about 91878.8594890032. The cubic root of 8441724821 is about 2036.1529462242.

The spelling of 8441724821 in words is "eight billion, four hundred forty-one million, seven hundred twenty-four thousand, eight hundred twenty-one".