1811488243 has 2 divisors, whose sum is σ = 1811488244. Its totient is φ = 1811488242.

The previous prime is 1811488207. The next prime is 1811488267. The reversal of 1811488243 is 3428841181.

It is a strong prime.

It is an emirp because it is prime and its reverse (3428841181) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1811488243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1811488196 and 1811488205.

It is not a weakly prime, because it can be changed into another prime (1811485243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905744121 + 905744122.

It is an arithmetic number, because the mean of its divisors is an integer number (905744122).

Almost surely, 2^1811488243 is an apocalyptic number.

1811488243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1811488243 is an equidigital number, since it uses as much as digits as its factorization.

1811488243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49152, while the sum is 40.

The square root of 1811488243 is about 42561.5817727678. The cubic root of 1811488243 is about 1219.0228319347.

The spelling of 1811488243 in words is "one billion, eight hundred eleven million, four hundred eighty-eight thousand, two hundred forty-three".