1813204373 has 2 divisors, whose sum is σ = 1813204374. Its totient is φ = 1813204372.

The previous prime is 1813204363. The next prime is 1813204391. The reversal of 1813204373 is 3734023181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1485485764 + 327718609 = 38542^2 + 18103^2 .

It is a cyclic number.

It is not a de Polignac number, because 1813204373 - 2¹⁰ = 1813203349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1813204363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906602186 + 906602187.

It is an arithmetic number, because the mean of its divisors is an integer number (906602187).

Almost surely, 2^1813204373 is an apocalyptic number.

It is an amenable number.

1813204373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813204373 is an equidigital number, since it uses as much as digits as its factorization.

1813204373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1813204373 is about 42581.7375526176. The cubic root of 1813204373 is about 1219.4076612562.

The spelling of 1813204373 in words is "one billion, eight hundred thirteen million, two hundred four thousand, three hundred seventy-three".