1228943642873 has 4 divisors (see below), whose sum is σ = 1228947055440. Its totient is φ = 1228940230308.

The previous prime is 1228943642767. The next prime is 1228943642881. The reversal of 1228943642873 is 3782463498221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1228943642873 - 2⁸ = 1228943642617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228943648873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092503 + ... + 1910876.

It is an arithmetic number, because the mean of its divisors is an integer number (307236763860).

Almost surely, 2^{1228943642873} is an apocalyptic number.

It is an amenable number.

1228943642873 is a deficient number, since it is larger than the sum of its proper divisors (3412567).

1228943642873 is an equidigital number, since it uses as much as digits as its factorization.

1228943642873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412566.

The product of its digits is 27869184, while the sum is 59.

The spelling of 1228943642873 in words is "one trillion, two hundred twenty-eight billion, nine hundred forty-three million, six hundred forty-two thousand, eight hundred seventy-three".