109789 has 2 divisors, whose sum is σ = 109790. Its totient is φ = 109788.

The previous prime is 109751. The next prime is 109793. The reversal of 109789 is 987901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96100 + 13689 = 310^2 + 117^2 .

It is a cyclic number.

It is not a de Polignac number, because 109789 - 2⁷ = 109661 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109589) 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 as a sum of consecutive naturals, namely, 54894 + 54895.

It is an arithmetic number, because the mean of its divisors is an integer number (54895).

2¹⁰⁹⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

109789 is a deficient number, since it is larger than the sum of its proper divisors (1).

109789 is an equidigital number, since it uses as much as digits as its factorization.

109789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 109789 is about 331.3442318798. The cubic root of 109789 is about 47.8835429130.

It can be divided in two parts, 109 and 789, that added together give a palindrome (898).

The spelling of 109789 in words is "one hundred nine thousand, seven hundred eighty-nine".