1223942173 has 4 divisors (see below), whose sum is σ = 1232156700. Its totient is φ = 1215727648.

The previous prime is 1223942123. The next prime is 1223942189. The reversal of 1223942173 is 3712493221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 777127129 + 446815044 = 27877^2 + 21138^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223942173 - 2¹⁷ = 1223811101 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 (1223942123) 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, 4107040 + ... + 4107337.

It is an arithmetic number, because the mean of its divisors is an integer number (308039175).

Almost surely, 2^1223942173 is an apocalyptic number.

It is an amenable number.

1223942173 is a deficient number, since it is larger than the sum of its proper divisors (8214527).

1223942173 is an equidigital number, since it uses as much as digits as its factorization.

1223942173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8214526.

The product of its digits is 18144, while the sum is 34.

The square root of 1223942173 is about 34984.8849219202. The cubic root of 1223942173 is about 1069.6794023058.

The spelling of 1223942173 in words is "one billion, two hundred twenty-three million, nine hundred forty-two thousand, one hundred seventy-three".