103663171991 has 2 divisors, whose sum is σ = 103663171992. Its totient is φ = 103663171990.

The previous prime is 103663171979. The next prime is 103663172047. The reversal of 103663171991 is 199171366301.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103663171991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103663171951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51831585995 + 51831585996.

It is an arithmetic number, because the mean of its divisors is an integer number (51831585996).

Almost surely, 2^103663171991 is an apocalyptic number.

103663171991 is a deficient number, since it is larger than the sum of its proper divisors (1).

103663171991 is an equidigital number, since it uses as much as digits as its factorization.

103663171991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 47.

The spelling of 103663171991 in words is "one hundred three billion, six hundred sixty-three million, one hundred seventy-one thousand, nine hundred ninety-one".