2705509 has 2 divisors, whose sum is σ = 2705510. Its totient is φ = 2705508.

The previous prime is 2705471. The next prime is 2705519. The reversal of 2705509 is 9055072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1988100 + 717409 = 1410^2 + 847^2 .

It is a cyclic number.

It is not a de Polignac number, because 2705509 - 2⁹ = 2704997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2705519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1352754 + 1352755.

It is an arithmetic number, because the mean of its divisors is an integer number (1352755).

2^2705509 is an apocalyptic number.

It is an amenable number.

2705509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2705509 is an equidigital number, since it uses as much as digits as its factorization.

2705509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 2705509 is about 1644.8431536168. The cubic root of 2705509 is about 139.3423062731.

The spelling of 2705509 in words is "two million, seven hundred five thousand, five hundred nine".