109709 has 4 divisors (see below), whose sum is σ = 113280. Its totient is φ = 106140.

The previous prime is 109673. The next prime is 109717. The reversal of 109709 is 907901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 907901 = 73 ⋅12437.

It is a cyclic number.

It is not a de Polignac number, because 109709 - 2⁸ = 109453 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109789) 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, 1739 + ... + 1800.

It is an arithmetic number, because the mean of its divisors is an integer number (28320).

2¹⁰⁹⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

109709 is a deficient number, since it is larger than the sum of its proper divisors (3571).

109709 is an equidigital number, since it uses as much as digits as its factorization.

109709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 109709 is about 331.2234895052. The cubic root of 109709 is about 47.8719096461.

It can be divided in two parts, 109 and 709, that added together give a palindrome (818).

The spelling of 109709 in words is "one hundred nine thousand, seven hundred nine".