108870809 has 2 divisors, whose sum is σ = 108870810. Its totient is φ = 108870808.

The previous prime is 108870793. The next prime is 108870821. The reversal of 108870809 is 908078801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101445184 + 7425625 = 10072^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 108870809 - 2⁴ = 108870793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (108870859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54435404 + 54435405.

It is an arithmetic number, because the mean of its divisors is an integer number (54435405).

Almost surely, 2^108870809 is an apocalyptic number.

It is an amenable number.

108870809 is a deficient number, since it is larger than the sum of its proper divisors (1).

108870809 is an equidigital number, since it uses as much as digits as its factorization.

108870809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 108870809 is about 10434.1175477373. The cubic root of 108870809 is about 477.4968196932.

The spelling of 108870809 in words is "one hundred eight million, eight hundred seventy thousand, eight hundred nine".