1813793 has 2 divisors, whose sum is σ = 1813794. Its totient is φ = 1813792.

The previous prime is 1813789. The next prime is 1813813. The reversal of 1813793 is 3973181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1507984 + 305809 = 1228^2 + 553^2 .

It is a cyclic number.

It is not a de Polignac number, because 1813793 - 2² = 1813789 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1813993) 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, 906896 + 906897.

It is an arithmetic number, because the mean of its divisors is an integer number (906897).

2^1813793 is an apocalyptic number.

It is an amenable number.

1813793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813793 is an equidigital number, since it uses as much as digits as its factorization.

1813793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 32.

The square root of 1813793 is about 1346.7713243160. The cubic root of 1813793 is about 121.9539600532.

The spelling of 1813793 in words is "one million, eight hundred thirteen thousand, seven hundred ninety-three".