444404889769 has 3 divisors (see below), whose sum is σ = 444405556407. Its totient is φ = 444404223132.

The previous prime is 444404889763. The next prime is 444404889781. The reversal of 444404889769 is 967988404444.

The square root of 444404889769 is 666637.

It is a perfect power (a square), and thus also a powerful 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 can be written as a sum of positive squares in only one way, i.e., 323709792025 + 120695097744 = 568955^2 + 347412^2 .

It is not a de Polignac number, because 444404889769 - 2¹⁷ = 444404758697 is a prime.

It is a super-2 number, since 2×444404889769² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444404889763) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 333319 + ... + 999955.

It is an arithmetic number, because the mean of its divisors is an integer number (148135185469).

Almost surely, 2^444404889769 is an apocalyptic number.

444404889769 is the 666637-th square number.

444404889769 is the 333319-th centered octagonal number.

It is an amenable number.

444404889769 is a deficient number, since it is larger than the sum of its proper divisors (666638).

444404889769 is an frugal number, since it uses more digits than its factorization.

444404889769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333274 (or 666637 counting only the distinct ones).

The product of its (nonzero) digits is 222953472, while the sum is 67.

The spelling of 444404889769 in words is "four hundred forty-four billion, four hundred four million, eight hundred eighty-nine thousand, seven hundred sixty-nine".