103891 has 4 divisors (see below), whose sum is σ = 108432. Its totient is φ = 99352.

The previous prime is 103889. The next prime is 103903. The reversal of 103891 is 198301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 103891 - 2¹ = 103889 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

103891 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2236 + ... + 2281.

It is an arithmetic number, because the mean of its divisors is an integer number (27108).

2¹⁰³⁸⁹¹ is an apocalyptic number.

103891 is a deficient number, since it is larger than the sum of its proper divisors (4541).

103891 is an equidigital number, since it uses as much as digits as its factorization.

103891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 103891 is about 322.3212683023. The cubic root of 103891 is about 47.0102588139.

The spelling of 103891 in words is "one hundred three thousand, eight hundred ninety-one".