444139 has 4 divisors (see below), whose sum is σ = 445480. Its totient is φ = 442800.

The previous prime is 444131. The next prime is 444151. The reversal of 444139 is 931444.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 444139 - 2³ = 444131 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 (444131) 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, 232 + ... + 970.

It is an arithmetic number, because the mean of its divisors is an integer number (111370).

2⁴⁴⁴¹³⁹ is an apocalyptic number.

444139 is a deficient number, since it is larger than the sum of its proper divisors (1341).

444139 is an equidigital number, since it uses as much as digits as its factorization.

444139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340.

The product of its digits is 1728, while the sum is 25.

The square root of 444139 is about 666.4375439604. The cubic root of 444139 is about 76.2967965002.

It can be divided in two parts, 444 and 139, that multiplied together give a palindrome (61716).

The spelling of 444139 in words is "four hundred forty-four thousand, one hundred thirty-nine".