108618641 has 2 divisors, whose sum is σ = 108618642. Its totient is φ = 108618640.

The previous prime is 108618619. The next prime is 108618647. The reversal of 108618641 is 146816801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72318016 + 36300625 = 8504^2 + 6025^2 .

It is an emirp because it is prime and its reverse (146816801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108618641 is a prime.

It is not a weakly prime, because it can be changed into another prime (108618647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54309320 + 54309321.

It is an arithmetic number, because the mean of its divisors is an integer number (54309321).

Almost surely, 2^108618641 is an apocalyptic number.

It is an amenable number.

108618641 is a deficient number, since it is larger than the sum of its proper divisors (1).

108618641 is an equidigital number, since it uses as much as digits as its factorization.

108618641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 108618641 is about 10422.0267222839. The cubic root of 108618641 is about 477.1278732218.

The spelling of 108618641 in words is "one hundred eight million, six hundred eighteen thousand, six hundred forty-one".