120636109 has 8 divisors (see below), whose sum is σ = 134086752. Its totient is φ = 107599440.

The previous prime is 120636107. The next prime is 120636119. The reversal of 120636109 is 901636021.

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 120636109 - 2¹ = 120636107 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 (120636107) 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, 102879 + ... + 104044.

It is an arithmetic number, because the mean of its divisors is an integer number (16760844).

Almost surely, 2^120636109 is an apocalyptic number.

It is an amenable number.

120636109 is a deficient number, since it is larger than the sum of its proper divisors (13450643).

120636109 is a wasteful number, since it uses less digits than its factorization.

120636109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206987.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 120636109 is about 10983.4470454407. The cubic root of 120636109 is about 494.1124236690.

The spelling of 120636109 in words is "one hundred twenty million, six hundred thirty-six thousand, one hundred nine".