444400013 has 4 divisors (see below), whose sum is σ = 444457728. Its totient is φ = 444342300.

The previous prime is 444400003. The next prime is 444400057. The reversal of 444400013 is 310004444.

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 444400013 - 2¹⁶ = 444334477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444400003) 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, 15131 + ... + 33432.

It is an arithmetic number, because the mean of its divisors is an integer number (111114432).

Almost surely, 2^444400013 is an apocalyptic number.

It is an amenable number.

444400013 is a deficient number, since it is larger than the sum of its proper divisors (57715).

444400013 is an equidigital number, since it uses as much as digits as its factorization.

444400013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57714.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 444400013 is about 21080.7972572197. The cubic root of 444400013 is about 763.1173968678.

Adding to 444400013 its reverse (310004444), we get a palindrome (754404457).

The spelling of 444400013 in words is "four hundred forty-four million, four hundred thousand, thirteen".