108556681 has 2 divisors, whose sum is σ = 108556682. Its totient is φ = 108556680.

The previous prime is 108556673. The next prime is 108556729. The reversal of 108556681 is 186655801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98188281 + 10368400 = 9909^2 + 3220^2 .

It is a cyclic number.

It is not a de Polignac number, because 108556681 - 2³ = 108556673 is a prime.

It is a super-2 number, since 2×108556681² = 23569105979471522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (108556601) 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, 54278340 + 54278341.

It is an arithmetic number, because the mean of its divisors is an integer number (54278341).

Almost surely, 2^108556681 is an apocalyptic number.

It is an amenable number.

108556681 is a deficient number, since it is larger than the sum of its proper divisors (1).

108556681 is an equidigital number, since it uses as much as digits as its factorization.

108556681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 108556681 is about 10419.0537478218. The cubic root of 108556681 is about 477.0371323024.

The spelling of 108556681 in words is "one hundred eight million, five hundred fifty-six thousand, six hundred eighty-one".