4409381 has 2 divisors, whose sum is σ = 4409382. Its totient is φ = 4409380.

The previous prime is 4409371. The next prime is 4409389. The reversal of 4409381 is 1839044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3389281 + 1020100 = 1841^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 4409381 - 2¹⁸ = 4147237 is a prime.

It is a super-2 number, since 2×4409381² = 38885281606322, 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 (4409389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2204690 + 2204691.

It is an arithmetic number, because the mean of its divisors is an integer number (2204691).

Almost surely, 2^4409381 is an apocalyptic number.

It is an amenable number.

4409381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4409381 is an equidigital number, since it uses as much as digits as its factorization.

4409381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 4409381 is about 2099.8526138756. The cubic root of 4409381 is about 163.9806268014.

The spelling of 4409381 in words is "four million, four hundred nine thousand, three hundred eighty-one".