2309649 has 8 divisors (see below), whose sum is σ = 3100800. Its totient is φ = 1529136.

The previous prime is 2309633. The next prime is 2309663. The reversal of 2309649 is 9469032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2309649 - 2⁴ = 2309633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2309609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2137 + ... + 3030.

It is an arithmetic number, because the mean of its divisors is an integer number (387600).

2^2309649 is an apocalyptic number.

It is an amenable number.

2309649 is a deficient number, since it is larger than the sum of its proper divisors (791151).

2309649 is a wasteful number, since it uses less digits than its factorization.

2309649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 2309649 is about 1519.7529404479. The cubic root of 2309649 is about 132.1849450685.

The spelling of 2309649 in words is "two million, three hundred nine thousand, six hundred forty-nine".