109809589 has 2 divisors, whose sum is σ = 109809590. Its totient is φ = 109809588.

The previous prime is 109809559. The next prime is 109809617. The reversal of 109809589 is 985908901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68310225 + 41499364 = 8265^2 + 6442^2 .

It is a cyclic number.

It is not a de Polignac number, because 109809589 - 2²³ = 101420981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109809509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54904794 + 54904795.

It is an arithmetic number, because the mean of its divisors is an integer number (54904795).

Almost surely, 2^109809589 is an apocalyptic number.

It is an amenable number.

109809589 is a deficient number, since it is larger than the sum of its proper divisors (1).

109809589 is an equidigital number, since it uses as much as digits as its factorization.

109809589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 49.

The square root of 109809589 is about 10479.0070617402. The cubic root of 109809589 is about 478.8653596531.

The spelling of 109809589 in words is "one hundred nine million, eight hundred nine thousand, five hundred eighty-nine".