103381991 has 2 divisors, whose sum is σ = 103381992. Its totient is φ = 103381990.

The previous prime is 103381979. The next prime is 103382017. The reversal of 103381991 is 199183301.

It is a weak prime.

It is an emirp because it is prime and its reverse (199183301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103381991 - 2¹⁴ = 103365607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103381961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51690995 + 51690996.

It is an arithmetic number, because the mean of its divisors is an integer number (51690996).

Almost surely, 2^103381991 is an apocalyptic number.

103381991 is a deficient number, since it is larger than the sum of its proper divisors (1).

103381991 is an equidigital number, since it uses as much as digits as its factorization.

103381991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 103381991 is about 10167.6934945936. The cubic root of 103381991 is about 469.3335824620. Note that the first 3 decimals are identical.

The spelling of 103381991 in words is "one hundred three million, three hundred eighty-one thousand, nine hundred ninety-one".