1243170090089 has 4 divisors (see below), whose sum is σ = 1286038024260. Its totient is φ = 1200302155920.

The previous prime is 1243170090083. The next prime is 1243170090121. The reversal of 1243170090089 is 9800900713421.

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 960023716864 + 283146373225 = 979808^2 + 532115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243170090089 - 2²⁴ = 1243153312873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243170090083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21433967042 + ... + 21433967099.

It is an arithmetic number, because the mean of its divisors is an integer number (321509506065).

Almost surely, 2^{1243170090089} is an apocalyptic number.

It is an amenable number.

1243170090089 is a deficient number, since it is larger than the sum of its proper divisors (42867934171).

1243170090089 is an equidigital number, since it uses as much as digits as its factorization.

1243170090089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42867934170.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 1243170090089 in words is "one trillion, two hundred forty-three billion, one hundred seventy million, ninety thousand, eighty-nine".