108209797 has 2 divisors, whose sum is σ = 108209798. Its totient is φ = 108209796.

The previous prime is 108209753. The next prime is 108209813. The reversal of 108209797 is 797902801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105390756 + 2819041 = 10266^2 + 1679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108209797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108209897) 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 as a sum of consecutive naturals, namely, 54104898 + 54104899.

It is an arithmetic number, because the mean of its divisors is an integer number (54104899).

Almost surely, 2^108209797 is an apocalyptic number.

It is an amenable number.

108209797 is a deficient number, since it is larger than the sum of its proper divisors (1).

108209797 is an equidigital number, since it uses as much as digits as its factorization.

108209797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 108209797 is about 10402.3938110418. The cubic root of 108209797 is about 476.5284790771.

The spelling of 108209797 in words is "one hundred eight million, two hundred nine thousand, seven hundred ninety-seven".