108784561 has 2 divisors, whose sum is σ = 108784562. Its totient is φ = 108784560.

The previous prime is 108784553. The next prime is 108784579. The reversal of 108784561 is 165487801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60217600 + 48566961 = 7760^2 + 6969^2 .

It is an emirp because it is prime and its reverse (165487801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108784561 - 2³ = 108784553 is a prime.

It is not a weakly prime, because it can be changed into another prime (108784541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54392280 + 54392281.

It is an arithmetic number, because the mean of its divisors is an integer number (54392281).

Almost surely, 2^108784561 is an apocalyptic number.

It is an amenable number.

108784561 is a deficient number, since it is larger than the sum of its proper divisors (1).

108784561 is an equidigital number, since it uses as much as digits as its factorization.

108784561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 108784561 is about 10429.9837487889. The cubic root of 108784561 is about 477.3706945912.

The spelling of 108784561 in words is "one hundred eight million, seven hundred eighty-four thousand, five hundred sixty-one".