108203987 has 2 divisors, whose sum is σ = 108203988. Its totient is φ = 108203986.

The previous prime is 108203971. The next prime is 108203989. The reversal of 108203987 is 789302801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 108203987 - 2⁴ = 108203971 is a prime.

Together with 108203989, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 108203987.

It is not a weakly prime, because it can be changed into another prime (108203989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54101993 + 54101994.

It is an arithmetic number, because the mean of its divisors is an integer number (54101994).

Almost surely, 2^108203987 is an apocalyptic number.

108203987 is a deficient number, since it is larger than the sum of its proper divisors (1).

108203987 is an equidigital number, since it uses as much as digits as its factorization.

108203987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 108203987 is about 10402.1145446491. The cubic root of 108203987 is about 476.5199503360.

The spelling of 108203987 in words is "one hundred eight million, two hundred three thousand, nine hundred eighty-seven".