2048509 has 2 divisors, whose sum is σ = 2048510. Its totient is φ = 2048508.

The previous prime is 2048471. The next prime is 2048521. The reversal of 2048509 is 9058402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 956484 = 1045^2 + 978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2048509 is a prime.

2048509 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2048569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1024254 + 1024255.

It is an arithmetic number, because the mean of its divisors is an integer number (1024255).

2^2048509 is an apocalyptic number.

It is an amenable number.

2048509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2048509 is an equidigital number, since it uses as much as digits as its factorization.

2048509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2048509 is about 1431.2613318329. The cubic root of 2048509 is about 127.0026039518.

The spelling of 2048509 in words is "two million, forty-eight thousand, five hundred nine".