109931 has 4 divisors (see below), whose sum is σ = 110664. Its totient is φ = 109200.

The previous prime is 109919. The next prime is 109937. The reversal of 109931 is 139901.

109931 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 109931 - 2¹⁰ = 108907 is a prime.

It is a super-2 number, since 2×109931² = 24169649522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 109897 and 109906.

It is not an unprimeable number, because it can be changed into a prime (109937) 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 in 3 ways as a sum of consecutive naturals, for example, 50 + ... + 471.

It is an arithmetic number, because the mean of its divisors is an integer number (27666).

2¹⁰⁹⁹³¹ is an apocalyptic number.

109931 is a deficient number, since it is larger than the sum of its proper divisors (733).

109931 is an equidigital number, since it uses as much as digits as its factorization.

109931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 109931 is about 331.5584413041. The cubic root of 109931 is about 47.9041780518.

The spelling of 109931 in words is "one hundred nine thousand, nine hundred thirty-one".