441440381 has 2 divisors, whose sum is σ = 441440382. Its totient is φ = 441440380.

The previous prime is 441440371. The next prime is 441440393. The reversal of 441440381 is 183044144.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258920281 + 182520100 = 16091^2 + 13510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-441440381 is a prime.

It is a super-2 number, since 2×441440381² = 389739219954850322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (441440371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220720190 + 220720191.

It is an arithmetic number, because the mean of its divisors is an integer number (220720191).

Almost surely, 2^441440381 is an apocalyptic number.

It is an amenable number.

441440381 is a deficient number, since it is larger than the sum of its proper divisors (1).

441440381 is an equidigital number, since it uses as much as digits as its factorization.

441440381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 441440381 is about 21010.4826455748. The cubic root of 441440381 is about 761.4195427676.

The spelling of 441440381 in words is "four hundred forty-one million, four hundred forty thousand, three hundred eighty-one".