108611609 has 2 divisors, whose sum is σ = 108611610. Its totient is φ = 108611608.

The previous prime is 108611603. The next prime is 108611621. The reversal of 108611609 is 906116801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61387225 + 47224384 = 7835^2 + 6872^2 .

It is an emirp because it is prime and its reverse (906116801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108611609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (108611603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54305804 + 54305805.

It is an arithmetic number, because the mean of its divisors is an integer number (54305805).

Almost surely, 2^108611609 is an apocalyptic number.

It is an amenable number.

108611609 is a deficient number, since it is larger than the sum of its proper divisors (1).

108611609 is an equidigital number, since it uses as much as digits as its factorization.

108611609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 108611609 is about 10421.6893544185. The cubic root of 108611609 is about 477.1175765373.

The spelling of 108611609 in words is "one hundred eight million, six hundred eleven thousand, six hundred nine".