2169109 has 2 divisors, whose sum is σ = 2169110. Its totient is φ = 2169108.

The previous prime is 2169073. The next prime is 2169133. The reversal of 2169109 is 9019612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1782225 + 386884 = 1335^2 + 622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2169109 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2169169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084554 + 1084555.

It is an arithmetic number, because the mean of its divisors is an integer number (1084555).

2^2169109 is an apocalyptic number.

It is an amenable number.

2169109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2169109 is an equidigital number, since it uses as much as digits as its factorization.

2169109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 2169109 is about 1472.7895301094. The cubic root of 2169109 is about 129.4475371736.

It can be divided in two parts, 2169 and 109, that added together give a triangular number (2278 = T₆₇).

The spelling of 2169109 in words is "two million, one hundred sixty-nine thousand, one hundred nine".