441919021 has 2 divisors, whose sum is σ = 441919022. Its totient is φ = 441919020.

The previous prime is 441919001. The next prime is 441919031. The reversal of 441919021 is 120919144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 414733225 + 27185796 = 20365^2 + 5214^2 .

It is a cyclic number.

It is not a de Polignac number, because 441919021 - 2⁵ = 441918989 is a prime.

It is a super-2 number, since 2×441919021² = 390584842243196882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (441919001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220959510 + 220959511.

It is an arithmetic number, because the mean of its divisors is an integer number (220959511).

Almost surely, 2^441919021 is an apocalyptic number.

It is an amenable number.

441919021 is a deficient number, since it is larger than the sum of its proper divisors (1).

441919021 is an equidigital number, since it uses as much as digits as its factorization.

441919021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 441919021 is about 21021.8700642926. The cubic root of 441919021 is about 761.6946378320.

The spelling of 441919021 in words is "four hundred forty-one million, nine hundred nineteen thousand, twenty-one".