185320109 has 8 divisors (see below), whose sum is σ = 199681440. Its totient is φ = 170973936.

The previous prime is 185320099. The next prime is 185320127. The reversal of 185320109 is 901023581.

185320109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 185320109 - 2¹² = 185316013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185320189) 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, 44102 + ... + 48120.

It is an arithmetic number, because the mean of its divisors is an integer number (24960180).

Almost surely, 2^185320109 is an apocalyptic number.

It is an amenable number.

185320109 is a deficient number, since it is larger than the sum of its proper divisors (14361331).

185320109 is a wasteful number, since it uses less digits than its factorization.

185320109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7579.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 185320109 is about 13613.2328636515. The cubic root of 185320109 is about 570.1303785065.

The spelling of 185320109 in words is "one hundred eighty-five million, three hundred twenty thousand, one hundred nine".