108981709 has 4 divisors (see below), whose sum is σ = 112497280. Its totient is φ = 105466140.

The previous prime is 108981703. The next prime is 108981721. The reversal of 108981709 is 907189801.

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: 907189801 = 7 ⋅129598543.

It is a cyclic number.

It is not a de Polignac number, because 108981709 - 2¹⁵ = 108948941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108981703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1757739 + ... + 1757800.

It is an arithmetic number, because the mean of its divisors is an integer number (28124320).

Almost surely, 2^108981709 is an apocalyptic number.

It is an amenable number.

108981709 is a deficient number, since it is larger than the sum of its proper divisors (3515571).

108981709 is an equidigital number, since it uses as much as digits as its factorization.

108981709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515570.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 108981709 is about 10439.4304921293. The cubic root of 108981709 is about 477.6588968912.

The spelling of 108981709 in words is "one hundred eight million, nine hundred eighty-one thousand, seven hundred nine".