102866689 has 2 divisors, whose sum is σ = 102866690. Its totient is φ = 102866688.

The previous prime is 102866681. The next prime is 102866713. The reversal of 102866689 is 986668201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102819600 + 47089 = 10140^2 + 217^2 .

It is a cyclic number.

It is not a de Polignac number, because 102866689 - 2³ = 102866681 is a prime.

It is not a weakly prime, because it can be changed into another prime (102866681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51433344 + 51433345.

It is an arithmetic number, because the mean of its divisors is an integer number (51433345).

Almost surely, 2^102866689 is an apocalyptic number.

It is an amenable number.

102866689 is a deficient number, since it is larger than the sum of its proper divisors (1).

102866689 is an equidigital number, since it uses as much as digits as its factorization.

102866689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 102866689 is about 10142.3216770126. The cubic root of 102866689 is about 468.5524938836.

The spelling of 102866689 in words is "one hundred two million, eight hundred sixty-six thousand, six hundred eighty-nine".