1223342791873 has 4 divisors (see below), whose sum is σ = 1224162179028. Its totient is φ = 1222523404720.

The previous prime is 1223342791861. The next prime is 1223342791903. The reversal of 1223342791873 is 3781972433221.

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 979611001009 + 243731790864 = 989753^2 + 493692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223342791873 - 2³³ = 1214752857281 is a prime.

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 1223342791873.

It is not an unprimeable number, because it can be changed into a prime (1223342794873) 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, 409691338 + ... + 409694323.

It is an arithmetic number, because the mean of its divisors is an integer number (306040544757).

Almost surely, 2^{1223342791873} is an apocalyptic number.

It is an amenable number.

1223342791873 is a deficient number, since it is larger than the sum of its proper divisors (819387155).

1223342791873 is an equidigital number, since it uses as much as digits as its factorization.

1223342791873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819387154.

The product of its digits is 3048192, while the sum is 52.

The spelling of 1223342791873 in words is "one trillion, two hundred twenty-three billion, three hundred forty-two million, seven hundred ninety-one thousand, eight hundred seventy-three".