109642889 has 2 divisors, whose sum is σ = 109642890. Its totient is φ = 109642888.

The previous prime is 109642853. The next prime is 109642913. The reversal of 109642889 is 988246901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59799289 + 49843600 = 7733^2 + 7060^2 .

It is an emirp because it is prime and its reverse (988246901) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109642889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109642829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54821444 + 54821445.

It is an arithmetic number, because the mean of its divisors is an integer number (54821445).

Almost surely, 2^109642889 is an apocalyptic number.

It is an amenable number.

109642889 is a deficient number, since it is larger than the sum of its proper divisors (1).

109642889 is an equidigital number, since it uses as much as digits as its factorization.

109642889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 109642889 is about 10471.0500428563. The cubic root of 109642889 is about 478.6229179111.

The spelling of 109642889 in words is "one hundred nine million, six hundred forty-two thousand, eight hundred eighty-nine".