103819681109 has 2 divisors, whose sum is σ = 103819681110. Its totient is φ = 103819681108.

The previous prime is 103819681081. The next prime is 103819681157. The reversal of 103819681109 is 901186918301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81965972209 + 21853708900 = 286297^2 + 147830^2 .

It is an emirp because it is prime and its reverse (901186918301) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103819681109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103819683109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51909840554 + 51909840555.

It is an arithmetic number, because the mean of its divisors is an integer number (51909840555).

Almost surely, 2^103819681109 is an apocalyptic number.

It is an amenable number.

103819681109 is a deficient number, since it is larger than the sum of its proper divisors (1).

103819681109 is an equidigital number, since it uses as much as digits as its factorization.

103819681109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 47.

The spelling of 103819681109 in words is "one hundred three billion, eight hundred nineteen million, six hundred eighty-one thousand, one hundred nine".