108389917 has 2 divisors, whose sum is σ = 108389918. Its totient is φ = 108389916.

The previous prime is 108389893. The next prime is 108389933. The reversal of 108389917 is 719983801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98188281 + 10201636 = 9909^2 + 3194^2 .

It is a cyclic number.

It is not a de Polignac number, because 108389917 - 2⁷ = 108389789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108389417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54194958 + 54194959.

It is an arithmetic number, because the mean of its divisors is an integer number (54194959).

Almost surely, 2^108389917 is an apocalyptic number.

It is an amenable number.

108389917 is a deficient number, since it is larger than the sum of its proper divisors (1).

108389917 is an equidigital number, since it uses as much as digits as its factorization.

108389917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 108389917 is about 10411.0478339118. The cubic root of 108389917 is about 476.7927334303.

The spelling of 108389917 in words is "one hundred eight million, three hundred eighty-nine thousand, nine hundred seventeen".