2648509 has 2 divisors, whose sum is σ = 2648510. Its totient is φ = 2648508.

The previous prime is 2648507. The next prime is 2648531. The reversal of 2648509 is 9058462.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2528100 + 120409 = 1590^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 2648509 - 2¹ = 2648507 is a prime.

Together with 2648507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2648501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324254 + 1324255.

It is an arithmetic number, because the mean of its divisors is an integer number (1324255).

2^2648509 is an apocalyptic number.

It is an amenable number.

2648509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2648509 is an equidigital number, since it uses as much as digits as its factorization.

2648509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2648509 is about 1627.4240381658. The cubic root of 2648509 is about 138.3567922023.

The spelling of 2648509 in words is "two million, six hundred forty-eight thousand, five hundred nine".