1812043817 has 2 divisors, whose sum is σ = 1812043818. Its totient is φ = 1812043816.

The previous prime is 1812043729. The next prime is 1812043829. The reversal of 1812043817 is 7183402181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1653560896 + 158482921 = 40664^2 + 12589^2 .

It is a cyclic number.

It is not a de Polignac number, because 1812043817 - 2⁸ = 1812043561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1812043897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906021908 + 906021909.

It is an arithmetic number, because the mean of its divisors is an integer number (906021909).

Almost surely, 2^1812043817 is an apocalyptic number.

It is an amenable number.

1812043817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812043817 is an equidigital number, since it uses as much as digits as its factorization.

1812043817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 1812043817 is about 42568.1079800359. The cubic root of 1812043817 is about 1219.1474418456.

Adding to 1812043817 its reverse (7183402181), we get a palindrome (8995445998).

The spelling of 1812043817 in words is "one billion, eight hundred twelve million, forty-three thousand, eight hundred seventeen".