2726509 has 2 divisors, whose sum is σ = 2726510. Its totient is φ = 2726508.

The previous prime is 2726491. The next prime is 2726561. The reversal of 2726509 is 9056272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2205225 + 521284 = 1485^2 + 722^2 .

It is a cyclic number.

It is not a de Polignac number, because 2726509 - 2⁹ = 2725997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2726569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1363254 + 1363255.

It is an arithmetic number, because the mean of its divisors is an integer number (1363255).

2^2726509 is an apocalyptic number.

It is an amenable number.

2726509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2726509 is an equidigital number, since it uses as much as digits as its factorization.

2726509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 2726509 is about 1651.2144015845. The cubic root of 2726509 is about 139.7018997229.

The spelling of 2726509 in words is "two million, seven hundred twenty-six thousand, five hundred nine".