444019409 has 2 divisors, whose sum is σ = 444019410. Its totient is φ = 444019408.

The previous prime is 444019403. The next prime is 444019441. The reversal of 444019409 is 904910444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371718400 + 72301009 = 19280^2 + 8503^2 .

It is a cyclic number.

It is not a de Polignac number, because 444019409 - 2²⁰ = 442970833 is a prime.

It is a Chen prime.

It is equal to p_23552783 and since 444019409 and 23552783 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (444019403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222009704 + 222009705.

It is an arithmetic number, because the mean of its divisors is an integer number (222009705).

Almost surely, 2^444019409 is an apocalyptic number.

It is an amenable number.

444019409 is a deficient number, since it is larger than the sum of its proper divisors (1).

444019409 is an equidigital number, since it uses as much as digits as its factorization.

444019409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 444019409 is about 21071.7680558609. The cubic root of 444019409 is about 762.8994787148.

The spelling of 444019409 in words is "four hundred forty-four million, nineteen thousand, four hundred nine".