943223612809 has 3 divisors (see below), whose sum is σ = 943224584007. Its totient is φ = 943222641612.

The previous prime is 943223612801. The next prime is 943223612813. The reversal of 943223612809 is 908216322349.

The square root of 943223612809 is 971197.

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., 909209925625 + 34013687184 = 953525^2 + 184428^2 .

It is not a de Polignac number, because 943223612809 - 2³ = 943223612801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (943223612801) 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, 485599 + ... + 1456795.

It is an arithmetic number, because the mean of its divisors is an integer number (314408194669).

Almost surely, 2^943223612809 is an apocalyptic number.

943223612809 is the 971197-th square number.

943223612809 is the 485599-th centered octagonal number.

It is an amenable number.

943223612809 is a deficient number, since it is larger than the sum of its proper divisors (971198).

943223612809 is an frugal number, since it uses more digits than its factorization.

943223612809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942394 (or 971197 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

Multiplying 943223612809 by its sum of digits (49), we get a square (46217957027641 = 6798379²).

The spelling of 943223612809 in words is "nine hundred forty-three billion, two hundred twenty-three million, six hundred twelve thousand, eight hundred nine".