2305649 has 2 divisors, whose sum is σ = 2305650. Its totient is φ = 2305648.

The previous prime is 2305643. The next prime is 2305651. The reversal of 2305649 is 9465032.

2305649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2050624 + 255025 = 1432^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 2305649 - 2⁸ = 2305393 is a prime.

It is a super-2 number, since 2×2305649² = 10632034622402, which contains 22 as substring.

Together with 2305651, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2 + 3¹² + 0 + 5⁷ + 6⁸ + 4⁷ + 9² .

It is not a weakly prime, because it can be changed into another prime (2305643) 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 as a sum of consecutive naturals, namely, 1152824 + 1152825.

It is an arithmetic number, because the mean of its divisors is an integer number (1152825).

2^2305649 is an apocalyptic number.

It is an amenable number.

2305649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2305649 is an equidigital number, since it uses as much as digits as its factorization.

2305649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 2305649 is about 1518.4363667932. The cubic root of 2305649 is about 132.1085921523.

The spelling of 2305649 in words is "two million, three hundred five thousand, six hundred forty-nine".