1943106172989 has 16 divisors (see below), whose sum is σ = 2746757552832. Its totient is φ = 1217626611968.

The previous prime is 1943106172979. The next prime is 1943106173003. The reversal of 1943106172989 is 9892716013491.

It is a cyclic number.

It is not a de Polignac number, because 1943106172989 - 2¹⁵ = 1943106140221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1943106172979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24604899 + ... + 24683744.

It is an arithmetic number, because the mean of its divisors is an integer number (171672347052).

Almost surely, 2^{1943106172989} is an apocalyptic number.

It is an amenable number.

1943106172989 is a deficient number, since it is larger than the sum of its proper divisors (803651379843).

1943106172989 is a wasteful number, since it uses less digits than its factorization.

1943106172989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49289436.

The product of its (nonzero) digits is 5878656, while the sum is 60.

The spelling of 1943106172989 in words is "one trillion, nine hundred forty-three billion, one hundred six million, one hundred seventy-two thousand, nine hundred eighty-nine".