108818639 has 2 divisors, whose sum is σ = 108818640. Its totient is φ = 108818638.

The previous prime is 108818623. The next prime is 108818651. The reversal of 108818639 is 936818801.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 108818639 - 2⁴ = 108818623 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 108818639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108818659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54409319 + 54409320.

It is an arithmetic number, because the mean of its divisors is an integer number (54409320).

Almost surely, 2^108818639 is an apocalyptic number.

108818639 is a deficient number, since it is larger than the sum of its proper divisors (1).

108818639 is an equidigital number, since it uses as much as digits as its factorization.

108818639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 108818639 is about 10431.6172763383. The cubic root of 108818639 is about 477.4205366521.

The spelling of 108818639 in words is "one hundred eight million, eight hundred eighteen thousand, six hundred thirty-nine".