2303649 has 6 divisors (see below), whose sum is σ = 3327506. Its totient is φ = 1535760.

The previous prime is 2303629. The next prime is 2303663. The reversal of 2303649 is 9463032.

It can be written as a sum of positive squares in only one way, i.e., 2117025 + 186624 = 1455^2 + 432^2 .

It is not a de Polignac number, because 2303649 - 2⁹ = 2303137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2303629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127972 + ... + 127989.

2^2303649 is an apocalyptic number.

It is an amenable number.

2303649 is a deficient number, since it is larger than the sum of its proper divisors (1023857).

2303649 is a wasteful number, since it uses less digits than its factorization.

2303649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255967 (or 255964 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 2303649 is about 1517.7776517000. Note that the first 3 decimals coincide. The cubic root of 2303649 is about 132.0703825754.

The spelling of 2303649 in words is "two million, three hundred three thousand, six hundred forty-nine".