103855813 has 2 divisors, whose sum is σ = 103855814. Its totient is φ = 103855812.

The previous prime is 103855751. The next prime is 103855823. The reversal of 103855813 is 318558301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70006689 + 33849124 = 8367^2 + 5818^2 .

It is a cyclic number.

It is not a de Polignac number, because 103855813 - 2¹⁷ = 103724741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103855823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51927906 + 51927907.

It is an arithmetic number, because the mean of its divisors is an integer number (51927907).

Almost surely, 2^103855813 is an apocalyptic number.

It is an amenable number.

103855813 is a deficient number, since it is larger than the sum of its proper divisors (1).

103855813 is an equidigital number, since it uses as much as digits as its factorization.

103855813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 103855813 is about 10190.9672259310. The cubic root of 103855813 is about 470.0495088936.

The spelling of 103855813 in words is "one hundred three million, eight hundred fifty-five thousand, eight hundred thirteen".