444421403 has 2 divisors, whose sum is σ = 444421404. Its totient is φ = 444421402.

The previous prime is 444421357. The next prime is 444421409. The reversal of 444421403 is 304124444.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 444421403 - 2⁸ = 444421147 is a prime.

It is a super-3 number, since 3×444421403³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (444421409) 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, 222210701 + 222210702.

It is an arithmetic number, because the mean of its divisors is an integer number (222210702).

Almost surely, 2^444421403 is an apocalyptic number.

444421403 is a deficient number, since it is larger than the sum of its proper divisors (1).

444421403 is an equidigital number, since it uses as much as digits as its factorization.

444421403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 444421403 is about 21081.3045848686. The cubic root of 444421403 is about 763.1296402062.

Adding to 444421403 its reverse (304124444), we get a palindrome (748545847).

The spelling of 444421403 in words is "four hundred forty-four million, four hundred twenty-one thousand, four hundred three".