102068509 has 2 divisors, whose sum is σ = 102068510. Its totient is φ = 102068508.

The previous prime is 102068497. The next prime is 102068539. The reversal of 102068509 is 905860201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62062884 + 40005625 = 7878^2 + 6325^2 .

It is a cyclic number.

It is not a de Polignac number, because 102068509 - 2¹³ = 102060317 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102068539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51034254 + 51034255.

It is an arithmetic number, because the mean of its divisors is an integer number (51034255).

Almost surely, 2^102068509 is an apocalyptic number.

It is an amenable number.

102068509 is a deficient number, since it is larger than the sum of its proper divisors (1).

102068509 is an equidigital number, since it uses as much as digits as its factorization.

102068509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 102068509 is about 10102.8960699395. The cubic root of 102068509 is about 467.3374561462.

The spelling of 102068509 in words is "one hundred two million, sixty-eight thousand, five hundred nine".