444004391 has 2 divisors, whose sum is σ = 444004392. Its totient is φ = 444004390.

The previous prime is 444004387. The next prime is 444004427. The reversal of 444004391 is 193400444.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 444004391 - 2² = 444004387 is a prime.

It is equal to p_23552039 and since 444004391 and 23552039 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444004361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222002195 + 222002196.

It is an arithmetic number, because the mean of its divisors is an integer number (222002196).

Almost surely, 2^444004391 is an apocalyptic number.

444004391 is a deficient number, since it is larger than the sum of its proper divisors (1).

444004391 is an equidigital number, since it uses as much as digits as its factorization.

444004391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 444004391 is about 21071.4116992669. The cubic root of 444004391 is about 762.8908774740.

The spelling of 444004391 in words is "four hundred forty-four million, four thousand, three hundred ninety-one".