108815881 has 2 divisors, whose sum is σ = 108815882. Its totient is φ = 108815880.

The previous prime is 108815879. The next prime is 108815891. The reversal of 108815881 is 188518801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98188281 + 10627600 = 9909^2 + 3260^2 .

It is an emirp because it is prime and its reverse (188518801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108815881 - 2¹ = 108815879 is a prime.

It is a super-2 number, since 2×108815881² = 23681791915612322, which contains 22 as substring.

Together with 108815879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (108815821) 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, 54407940 + 54407941.

It is an arithmetic number, because the mean of its divisors is an integer number (54407941).

Almost surely, 2^108815881 is an apocalyptic number.

It is an amenable number.

108815881 is a deficient number, since it is larger than the sum of its proper divisors (1).

108815881 is an equidigital number, since it uses as much as digits as its factorization.

108815881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20480, while the sum is 40.

The square root of 108815881 is about 10431.4850812336. The cubic root of 108815881 is about 477.4165032225.

The spelling of 108815881 in words is "one hundred eight million, eight hundred fifteen thousand, eight hundred eighty-one".