2189717938943 has 4 divisors (see below), whose sum is σ = 2189732743440. Its totient is φ = 2189703134448.

The previous prime is 2189717938909. The next prime is 2189717938981. The reversal of 2189717938943 is 3498397179812.

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

It is a cyclic number.

It is not a de Polignac number, because 2189717938943 - 2¹⁰ = 2189717937919 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 (2189717988943) 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, 7178123 + ... + 7476956.

It is an arithmetic number, because the mean of its divisors is an integer number (547433185860).

Almost surely, 2^{2189717938943} is an apocalyptic number.

2189717938943 is a deficient number, since it is larger than the sum of its proper divisors (14804497).

2189717938943 is a wasteful number, since it uses less digits than its factorization.

2189717938943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14804496.

The product of its digits is 164602368, while the sum is 71.

The spelling of 2189717938943 in words is "two trillion, one hundred eighty-nine billion, seven hundred seventeen million, nine hundred thirty-eight thousand, nine hundred forty-three".