108181789 has 2 divisors, whose sum is σ = 108181790. Its totient is φ = 108181788.

The previous prime is 108181781. The next prime is 108181813. The reversal of 108181789 is 987181801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97357689 + 10824100 = 9867^2 + 3290^2 .

It is a cyclic number.

It is not a de Polignac number, because 108181789 - 2³ = 108181781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108181781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54090894 + 54090895.

It is an arithmetic number, because the mean of its divisors is an integer number (54090895).

Almost surely, 2^108181789 is an apocalyptic number.

It is an amenable number.

108181789 is a deficient number, since it is larger than the sum of its proper divisors (1).

108181789 is an equidigital number, since it uses as much as digits as its factorization.

108181789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 43.

The square root of 108181789 is about 10401.0474953247. The cubic root of 108181789 is about 476.4873621552.

The spelling of 108181789 in words is "one hundred eight million, one hundred eighty-one thousand, seven hundred eighty-nine".