2689601 has 2 divisors, whose sum is σ = 2689602. Its totient is φ = 2689600.

The previous prime is 2689573. The next prime is 2689613. The reversal of 2689601 is 1069862.

It is a Cunningham number, because it is equal to 1640²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2689600 + 1 = 1640^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 2689601 - 2⁶ = 2689537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2689651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344800 + 1344801.

It is an arithmetic number, because the mean of its divisors is an integer number (1344801).

2^2689601 is an apocalyptic number.

It is an amenable number.

2689601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689601 is an equidigital number, since it uses as much as digits as its factorization.

2689601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2689601 is about 1640.0003048780. Note that the first 3 decimals coincide. The cubic root of 2689601 is about 139.0686650720.

The spelling of 2689601 in words is "two million, six hundred eighty-nine thousand, six hundred one".