441818821 has 2 divisors, whose sum is σ = 441818822. Its totient is φ = 441818820.

The previous prime is 441818807. The next prime is 441818833. The reversal of 441818821 is 128818144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290873025 + 150945796 = 17055^2 + 12286^2 .

It is a cyclic number.

It is not a de Polignac number, because 441818821 - 2⁷ = 441818693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (441848821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220909410 + 220909411.

It is an arithmetic number, because the mean of its divisors is an integer number (220909411).

Almost surely, 2^441818821 is an apocalyptic number.

It is an amenable number.

441818821 is a deficient number, since it is larger than the sum of its proper divisors (1).

441818821 is an equidigital number, since it uses as much as digits as its factorization.

441818821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16384, while the sum is 37.

The square root of 441818821 is about 21019.4866968725. The cubic root of 441818821 is about 761.6370650127.

The spelling of 441818821 in words is "four hundred forty-one million, eight hundred eighteen thousand, eight hundred twenty-one".