108185321 has 2 divisors, whose sum is σ = 108185322. Its totient is φ = 108185320.

The previous prime is 108185317. The next prime is 108185323. The reversal of 108185321 is 123581801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100000000 + 8185321 = 10000^2 + 2861^2 .

It is a cyclic number.

It is not a de Polignac number, because 108185321 - 2² = 108185317 is a prime.

It is a Sophie Germain prime.

Together with 108185323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (108185323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54092660 + 54092661.

It is an arithmetic number, because the mean of its divisors is an integer number (54092661).

Almost surely, 2^108185321 is an apocalyptic number.

It is an amenable number.

108185321 is a deficient number, since it is larger than the sum of its proper divisors (1).

108185321 is an equidigital number, since it uses as much as digits as its factorization.

108185321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 108185321 is about 10401.2172845297. The cubic root of 108185321 is about 476.4925476707.

The spelling of 108185321 in words is "one hundred eight million, one hundred eighty-five thousand, three hundred twenty-one".