2309849 has 4 divisors (see below), whose sum is σ = 2431440. Its totient is φ = 2188260.

The previous prime is 2309837. The next prime is 2309863. The reversal of 2309849 is 9489032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2309849 - 2¹² = 2305753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2309869) 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 in 3 ways as a sum of consecutive naturals, for example, 60767 + ... + 60804.

It is an arithmetic number, because the mean of its divisors is an integer number (607860).

2^2309849 is an apocalyptic number.

It is an amenable number.

2309849 is a deficient number, since it is larger than the sum of its proper divisors (121591).

2309849 is a wasteful number, since it uses less digits than its factorization.

2309849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121590.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2309849 is about 1519.8187391923. The cubic root of 2309849 is about 132.1887603995.

The spelling of 2309849 in words is "two million, three hundred nine thousand, eight hundred forty-nine".