109555909 has 8 divisors (see below), whose sum is σ = 110805408. Its totient is φ = 108310800.

The previous prime is 109555903. The next prime is 109555913. The reversal of 109555909 is 909555901.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 109555909 - 2¹³ = 109547717 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 (109555903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83559 + ... + 84859.

It is an arithmetic number, because the mean of its divisors is an integer number (13850676).

Almost surely, 2^109555909 is an apocalyptic number.

It is an amenable number.

109555909 is a deficient number, since it is larger than the sum of its proper divisors (1249499).

109555909 is a wasteful number, since it uses less digits than its factorization.

109555909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195.

The product of its (nonzero) digits is 91125, while the sum is 43.

The square root of 109555909 is about 10466.8958626710. The cubic root of 109555909 is about 478.4963201438.

The spelling of 109555909 in words is "one hundred nine million, five hundred fifty-five thousand, nine hundred nine".