2698609 has 2 divisors, whose sum is σ = 2698610. Its totient is φ = 2698608.

The previous prime is 2698607. The next prime is 2698649. The reversal of 2698609 is 9068962.

It is a happy number.

2698609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2698649) can be obtained adding 2698609 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2131600 + 567009 = 1460^2 + 753^2 .

It is a cyclic number.

It is not a de Polignac number, because 2698609 - 2¹ = 2698607 is a prime.

Together with 2698607, it forms a pair of twin primes.

It is a Chen prime.

2698609 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2698607) 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, 1349304 + 1349305.

It is an arithmetic number, because the mean of its divisors is an integer number (1349305).

2^2698609 is an apocalyptic number.

It is an amenable number.

2698609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2698609 is an equidigital number, since it uses as much as digits as its factorization.

2698609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 2698609 is about 1642.7443501653. The cubic root of 2698609 is about 139.2237481227.

The spelling of 2698609 in words is "two million, six hundred ninety-eight thousand, six hundred nine".