1813444141 has 2 divisors, whose sum is σ = 1813444142. Its totient is φ = 1813444140.

The previous prime is 1813444133. The next prime is 1813444147. The reversal of 1813444141 is 1414443181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1614352041 + 199092100 = 40179^2 + 14110^2 .

It is an emirp because it is prime and its reverse (1414443181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1813444141 - 2³ = 1813444133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1813444147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906722070 + 906722071.

It is an arithmetic number, because the mean of its divisors is an integer number (906722071).

It is a self-describing number.

Almost surely, 2^1813444141 is an apocalyptic number.

It is an amenable number.

1813444141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813444141 is an equidigital number, since it uses as much as digits as its factorization.

1813444141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 31.

The square root of 1813444141 is about 42584.5528448991. The cubic root of 1813444141 is about 1219.4614081024.

The spelling of 1813444141 in words is "one billion, eight hundred thirteen million, four hundred forty-four thousand, one hundred forty-one".