1813685063 has 2 divisors, whose sum is σ = 1813685064. Its totient is φ = 1813685062.

The previous prime is 1813685059. The next prime is 1813685161. The reversal of 1813685063 is 3605863181.

It is a weak prime.

It is an emirp because it is prime and its reverse (3605863181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1813685063 - 2² = 1813685059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1813685063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1813685053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906842531 + 906842532.

It is an arithmetic number, because the mean of its divisors is an integer number (906842532).

Almost surely, 2^1813685063 is an apocalyptic number.

1813685063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813685063 is an equidigital number, since it uses as much as digits as its factorization.

1813685063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1813685063 is about 42587.3814996884. The cubic root of 1813685063 is about 1219.5154088599.

The spelling of 1813685063 in words is "one billion, eight hundred thirteen million, six hundred eighty-five thousand, sixty-three".