109831 has 2 divisors, whose sum is σ = 109832. Its totient is φ = 109830.

The previous prime is 109829. The next prime is 109841. The reversal of 109831 is 138901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109831 - 2¹ = 109829 is a prime.

It is a super-2 number, since 2×109831² = 24125697122, which contains 22 as substring.

Together with 109829, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54915 + 54916.

It is an arithmetic number, because the mean of its divisors is an integer number (54916).

2¹⁰⁹⁸³¹ is an apocalyptic number.

109831 is a deficient number, since it is larger than the sum of its proper divisors (1).

109831 is an equidigital number, since it uses as much as digits as its factorization.

109831 is an odious number, because the sum of its binary digits is odd.

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

The square root of 109831 is about 331.4076040166. The cubic root of 109831 is about 47.8896481161.

The spelling of 109831 in words is "one hundred nine thousand, eight hundred thirty-one".