2048309 has 4 divisors (see below), whose sum is σ = 2059116. Its totient is φ = 2037504.

The previous prime is 2048273. The next prime is 2048327. The reversal of 2048309 is 9038402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1493284 + 555025 = 1222^2 + 745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2048309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2048329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5114 + ... + 5499.

It is an arithmetic number, because the mean of its divisors is an integer number (514779).

2^2048309 is an apocalyptic number.

It is an amenable number.

2048309 is a deficient number, since it is larger than the sum of its proper divisors (10807).

2048309 is a wasteful number, since it uses less digits than its factorization.

2048309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10806.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2048309 is about 1431.1914616850. The cubic root of 2048309 is about 126.9984706452.

The spelling of 2048309 in words is "two million, forty-eight thousand, three hundred nine".