1813180073 has 2 divisors, whose sum is σ = 1813180074. Its totient is φ = 1813180072.

The previous prime is 1813180009. The next prime is 1813180081. The reversal of 1813180073 is 3700813181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1711311424 + 101868649 = 41368^2 + 10093^2 .

It is a cyclic number.

It is not a de Polignac number, because 1813180073 - 2⁶ = 1813180009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1813180003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906590036 + 906590037.

It is an arithmetic number, because the mean of its divisors is an integer number (906590037).

Almost surely, 2^1813180073 is an apocalyptic number.

It is an amenable number.

1813180073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813180073 is an equidigital number, since it uses as much as digits as its factorization.

1813180073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1813180073 is about 42581.4522180726. The cubic root of 1813180073 is about 1219.4022138580.

The spelling of 1813180073 in words is "one billion, eight hundred thirteen million, one hundred eighty thousand, seventy-three".