2608649 has 2 divisors, whose sum is σ = 2608650. Its totient is φ = 2608648.

The previous prime is 2608631. The next prime is 2608663. The reversal of 2608649 is 9468062.

2608649 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., 2325625 + 283024 = 1525^2 + 532^2 .

It is a cyclic number.

It is not a de Polignac number, because 2608649 - 2⁸ = 2608393 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (2608699) 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, 1304324 + 1304325.

It is an arithmetic number, because the mean of its divisors is an integer number (1304325).

2^2608649 is an apocalyptic number.

It is an amenable number.

2608649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2608649 is an equidigital number, since it uses as much as digits as its factorization.

2608649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 2608649 is about 1615.1312640154. The cubic root of 2608649 is about 137.6591919314.

The spelling of 2608649 in words is "two million, six hundred eight thousand, six hundred forty-nine".