2509279 has 2 divisors, whose sum is σ = 2509280. Its totient is φ = 2509278.

The previous prime is 2509271. The next prime is 2509301. The reversal of 2509279 is 9729052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2509279 - 2³ = 2509271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2509271) 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, 1254639 + 1254640.

It is an arithmetic number, because the mean of its divisors is an integer number (1254640).

2^2509279 is an apocalyptic number.

2509279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2509279 is an equidigital number, since it uses as much as digits as its factorization.

2509279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 2509279 is about 1584.0703898501. The cubic root of 2509279 is about 135.8885873878. Note that the first 3 decimals are identical.

The spelling of 2509279 in words is "two million, five hundred nine thousand, two hundred seventy-nine".