109791 has 12 divisors (see below), whose sum is σ = 173160. Its totient is φ = 66480.

The previous prime is 109789. The next prime is 109793. The reversal of 109791 is 197901.

It is an interprime number because it is at equal distance from previous prime (109789) and next prime (109793).

It is not a de Polignac number, because 109791 - 2¹ = 109789 is a prime.

It is a plaindrome in base 16.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 456 + ... + 653.

It is an arithmetic number, because the mean of its divisors is an integer number (14430).

2¹⁰⁹⁷⁹¹ is an apocalyptic number.

109791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

109791 is a deficient number, since it is larger than the sum of its proper divisors (63369).

109791 is a wasteful number, since it uses less digits than its factorization.

109791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 27.

The square root of 109791 is about 331.3472498754. The cubic root of 109791 is about 47.8838336723.

It can be divided in two parts, 109 and 791, that added together give a square (900 = 30²).

The spelling of 109791 in words is "one hundred nine thousand, seven hundred ninety-one".