108889813 has 2 divisors, whose sum is σ = 108889814. Its totient is φ = 108889812.

The previous prime is 108889799. The next prime is 108889831. The reversal of 108889813 is 318988801.

Together with next prime (108889831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100140049 + 8749764 = 10007^2 + 2958^2 .

It is an emirp because it is prime and its reverse (318988801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108889813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108889013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54444906 + 54444907.

It is an arithmetic number, because the mean of its divisors is an integer number (54444907).

Almost surely, 2^108889813 is an apocalyptic number.

It is an amenable number.

108889813 is a deficient number, since it is larger than the sum of its proper divisors (1).

108889813 is an equidigital number, since it uses as much as digits as its factorization.

108889813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 46.

The square root of 108889813 is about 10435.0281743750. The cubic root of 108889813 is about 477.5246013110.

The spelling of 108889813 in words is "one hundred eight million, eight hundred eighty-nine thousand, eight hundred thirteen".