102885109 has 2 divisors, whose sum is σ = 102885110. Its totient is φ = 102885108.

The previous prime is 102885103. The next prime is 102885119. The reversal of 102885109 is 901588201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87946884 + 14938225 = 9378^2 + 3865^2 .

It is a cyclic number.

It is not a de Polignac number, because 102885109 - 2¹⁷ = 102754037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102885103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51442554 + 51442555.

It is an arithmetic number, because the mean of its divisors is an integer number (51442555).

Almost surely, 2^102885109 is an apocalyptic number.

It is an amenable number.

102885109 is a deficient number, since it is larger than the sum of its proper divisors (1).

102885109 is an equidigital number, since it uses as much as digits as its factorization.

102885109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 102885109 is about 10143.2297124732. The cubic root of 102885109 is about 468.5804595996.

The spelling of 102885109 in words is "one hundred two million, eight hundred eighty-five thousand, one hundred nine".