108242909 has 2 divisors, whose sum is σ = 108242910. Its totient is φ = 108242908.

The previous prime is 108242881. The next prime is 108242923. The reversal of 108242909 is 909242801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77827684 + 30415225 = 8822^2 + 5515^2 .

It is an emirp because it is prime and its reverse (909242801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108242909 - 2¹⁶ = 108177373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108242509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54121454 + 54121455.

It is an arithmetic number, because the mean of its divisors is an integer number (54121455).

Almost surely, 2^108242909 is an apocalyptic number.

It is an amenable number.

108242909 is a deficient number, since it is larger than the sum of its proper divisors (1).

108242909 is an equidigital number, since it uses as much as digits as its factorization.

108242909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 108242909 is about 10403.9852460487. The cubic root of 108242909 is about 476.5770797345.

The spelling of 108242909 in words is "one hundred eight million, two hundred forty-two thousand, nine hundred nine".