1812105913 has 2 divisors, whose sum is σ = 1812105914. Its totient is φ = 1812105912.

The previous prime is 1812105863. The next prime is 1812105941. The reversal of 1812105913 is 3195012181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1812034624 + 71289 = 42568^2 + 267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1812105913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1812105313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906052956 + 906052957.

It is an arithmetic number, because the mean of its divisors is an integer number (906052957).

Almost surely, 2^1812105913 is an apocalyptic number.

It is an amenable number.

1812105913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812105913 is an equidigital number, since it uses as much as digits as its factorization.

1812105913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 1812105913 is about 42568.8373461151. The cubic root of 1812105913 is about 1219.1613677993.

The spelling of 1812105913 in words is "one billion, eight hundred twelve million, one hundred five thousand, nine hundred thirteen".