443173798369 has 3 divisors (see below), whose sum is σ = 443174464083. Its totient is φ = 443173132656.

The previous prime is 443173798357. The next prime is 443173798387. The reversal of 443173798369 is 963897371344.

The square root of 443173798369 is 665713.

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., 350446240225 + 92727558144 = 591985^2 + 304512^2 .

It is not a de Polignac number, because 443173798369 - 2⁷ = 443173798241 is a prime.

It is a super-2 number, since 2×443173798369² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 443173798369.

It is not an unprimeable number, because it can be changed into a prime (443173798339) 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, 332857 + ... + 998569.

It is an arithmetic number, because the mean of its divisors is an integer number (147724821361).

Almost surely, 2^443173798369 is an apocalyptic number.

443173798369 is the 665713-rd square number.

443173798369 is the 332857-th centered octagonal number.

It is an amenable number.

443173798369 is a deficient number, since it is larger than the sum of its proper divisors (665714).

443173798369 is an frugal number, since it uses more digits than its factorization.

443173798369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331426 (or 665713 counting only the distinct ones).

The product of its digits is 82301184, while the sum is 64.

Multiplying 443173798369 by its sum of digits (64), we get a square (28363123095616 = 5325704²).

The spelling of 443173798369 in words is "four hundred forty-three billion, one hundred seventy-three million, seven hundred ninety-eight thousand, three hundred sixty-nine".