109789989 has 8 divisors (see below), whose sum is σ = 150343200. Its totient is φ = 71215056.

The previous prime is 109789987. The next prime is 109789991. The reversal of 109789989 is 989987901.

It is an interprime number because it is at equal distance from previous prime (109789987) and next prime (109789991).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 109789989 - 2¹ = 109789987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109789987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494439 + ... + 494660.

It is an arithmetic number, because the mean of its divisors is an integer number (18792900).

Almost surely, 2^109789989 is an apocalyptic number.

It is an amenable number.

109789989 is a deficient number, since it is larger than the sum of its proper divisors (40553211).

109789989 is an equidigital number, since it uses as much as digits as its factorization.

109789989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989139.

The product of its (nonzero) digits is 2939328, while the sum is 60.

The square root of 109789989 is about 10478.0718168946. The cubic root of 109789989 is about 478.8368669394.

The spelling of 109789989 in words is "one hundred nine million, seven hundred eighty-nine thousand, nine hundred eighty-nine".