102108689 has 2 divisors, whose sum is σ = 102108690. Its totient is φ = 102108688.

The previous prime is 102108673. The next prime is 102108731. The reversal of 102108689 is 986801201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98168464 + 3940225 = 9908^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 102108689 - 2⁴ = 102108673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102108649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51054344 + 51054345.

It is an arithmetic number, because the mean of its divisors is an integer number (51054345).

Almost surely, 2^102108689 is an apocalyptic number.

It is an amenable number.

102108689 is a deficient number, since it is larger than the sum of its proper divisors (1).

102108689 is an equidigital number, since it uses as much as digits as its factorization.

102108689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 102108689 is about 10104.8844129955. The cubic root of 102108689 is about 467.3987716806.

The spelling of 102108689 in words is "one hundred two million, one hundred eight thousand, six hundred eighty-nine".