103109891 has 2 divisors, whose sum is σ = 103109892. Its totient is φ = 103109890.

The previous prime is 103109863. The next prime is 103109911. The reversal of 103109891 is 198901301.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103109891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (103109291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51554945 + 51554946.

It is an arithmetic number, because the mean of its divisors is an integer number (51554946).

Almost surely, 2^103109891 is an apocalyptic number.

103109891 is a deficient number, since it is larger than the sum of its proper divisors (1).

103109891 is an equidigital number, since it uses as much as digits as its factorization.

103109891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 103109891 is about 10154.3040628100. The cubic root of 103109891 is about 468.9214608067.

The spelling of 103109891 in words is "one hundred three million, one hundred nine thousand, eight hundred ninety-one".