2909149 has 2 divisors, whose sum is σ = 2909150. Its totient is φ = 2909148.

The previous prime is 2909141. The next prime is 2909161. The reversal of 2909149 is 9419092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1643524 + 1265625 = 1282^2 + 1125^2 .

It is a cyclic number.

It is not a de Polignac number, because 2909149 - 2³ = 2909141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2909141) 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, 1454574 + 1454575.

It is an arithmetic number, because the mean of its divisors is an integer number (1454575).

2^2909149 is an apocalyptic number.

It is an amenable number.

2909149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2909149 is an equidigital number, since it uses as much as digits as its factorization.

2909149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 2909149 is about 1705.6227601671. The cubic root of 2909149 is about 142.7541212952.

The spelling of 2909149 in words is "two million, nine hundred nine thousand, one hundred forty-nine".