1844009191243 has 2 divisors, whose sum is σ = 1844009191244. Its totient is φ = 1844009191242.

The previous prime is 1844009191237. The next prime is 1844009191259. The reversal of 1844009191243 is 3421919004481.

It is a weak prime.

It is an emirp because it is prime and its reverse (3421919004481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1844009191243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1844009191193 and 1844009191202.

It is not a weakly prime, because it can be changed into another prime (1844009171243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 922004595621 + 922004595622.

It is an arithmetic number, because the mean of its divisors is an integer number (922004595622).

Almost surely, 2^{1844009191243} is an apocalyptic number.

1844009191243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1844009191243 is an equidigital number, since it uses as much as digits as its factorization.

1844009191243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 1844009191243 in words is "one trillion, eight hundred forty-four billion, nine million, one hundred ninety-one thousand, two hundred forty-three".