444824021 has 2 divisors, whose sum is σ = 444824022. Its totient is φ = 444824020.

The previous prime is 444823997. The next prime is 444824033. The reversal of 444824021 is 120428444.

444824021 is nontrivially palindromic in base 5.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316341796 + 128482225 = 17786^2 + 11335^2 .

It is a cyclic number.

It is not a de Polignac number, because 444824021 - 2¹⁰ = 444822997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444824041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222412010 + 222412011.

It is an arithmetic number, because the mean of its divisors is an integer number (222412011).

Almost surely, 2^444824021 is an apocalyptic number.

It is an amenable number.

444824021 is a deficient number, since it is larger than the sum of its proper divisors (1).

444824021 is an equidigital number, since it uses as much as digits as its factorization.

444824021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8192, while the sum is 29.

The square root of 444824021 is about 21090.8515949451. The cubic root of 444824021 is about 763.3600198947.

The spelling of 444824021 in words is "four hundred forty-four million, eight hundred twenty-four thousand, twenty-one".