444023213 has 4 divisors (see below), whose sum is σ = 449643840. Its totient is φ = 438402588.

The previous prime is 444023197. The next prime is 444023231. The reversal of 444023213 is 312320444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 444023213 - 2⁴ = 444023197 is a prime.

It is a super-2 number, since 2×444023213² = 394313227365686738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444023243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2810195 + ... + 2810352.

It is an arithmetic number, because the mean of its divisors is an integer number (112410960).

Almost surely, 2^444023213 is an apocalyptic number.

It is an amenable number.

444023213 is a deficient number, since it is larger than the sum of its proper divisors (5620627).

444023213 is an equidigital number, since it uses as much as digits as its factorization.

444023213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5620626.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 444023213 is about 21071.8583186201. The cubic root of 444023213 is about 762.9016573443.

Adding to 444023213 its reverse (312320444), we get a palindrome (756343657).

The spelling of 444023213 in words is "four hundred forty-four million, twenty-three thousand, two hundred thirteen".