2685689 has 2 divisors, whose sum is σ = 2685690. Its totient is φ = 2685688.

The previous prime is 2685673. The next prime is 2685703. The reversal of 2685689 is 9865862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2301289 + 384400 = 1517^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 2685689 - 2⁴ = 2685673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2685629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342844 + 1342845.

It is an arithmetic number, because the mean of its divisors is an integer number (1342845).

2^2685689 is an apocalyptic number.

It is an amenable number.

2685689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685689 is an equidigital number, since it uses as much as digits as its factorization.

2685689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 2685689 is about 1638.8071881707. The cubic root of 2685689 is about 139.0012076565.

The spelling of 2685689 in words is "two million, six hundred eighty-five thousand, six hundred eighty-nine".