444688169 has 4 divisors (see below), whose sum is σ = 445071696. Its totient is φ = 444304644.

The previous prime is 444688157. The next prime is 444688171. The reversal of 444688169 is 961886444.

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 a de Polignac number, because none of the positive numbers 2^k-444688169 is a prime.

It is a super-2 number, since 2×444688169² = 395495135297145122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444688199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190019 + ... + 192344.

It is an arithmetic number, because the mean of its divisors is an integer number (111267924).

Almost surely, 2^444688169 is an apocalyptic number.

It is an amenable number.

444688169 is a deficient number, since it is larger than the sum of its proper divisors (383527).

444688169 is a wasteful number, since it uses less digits than its factorization.

444688169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383526.

The product of its digits is 1327104, while the sum is 50.

The square root of 444688169 is about 21087.6307109168. The cubic root of 444688169 is about 763.2823003624.

The spelling of 444688169 in words is "four hundred forty-four million, six hundred eighty-eight thousand, one hundred sixty-nine".