2170109 has 2 divisors, whose sum is σ = 2170110. Its totient is φ = 2170108.

The previous prime is 2170061. The next prime is 2170111. The reversal of 2170109 is 9010712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1836025 + 334084 = 1355^2 + 578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2170109 is a prime.

Together with 2170111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2170159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085054 + 1085055.

It is an arithmetic number, because the mean of its divisors is an integer number (1085055).

2^2170109 is an apocalyptic number.

It is an amenable number.

2170109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2170109 is an equidigital number, since it uses as much as digits as its factorization.

2170109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 2170109 is about 1473.1289828118. The cubic root of 2170109 is about 129.4674266996.

The spelling of 2170109 in words is "two million, one hundred seventy thousand, one hundred nine".