1208689 has 2 divisors, whose sum is σ = 1208690. Its totient is φ = 1208688.

The previous prime is 1208681. The next prime is 1208707. The reversal of 1208689 is 9868021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 950625 + 258064 = 975^2 + 508^2 .

It is an emirp because it is prime and its reverse (9868021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1208689 - 2³ = 1208681 is a prime.

It is an Ulam number.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (1208681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604344 + 604345.

It is an arithmetic number, because the mean of its divisors is an integer number (604345).

2^1208689 is an apocalyptic number.

It is an amenable number.

1208689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208689 is an equidigital number, since it uses as much as digits as its factorization.

1208689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1208689 is about 1099.4039294090. The cubic root of 1208689 is about 106.5217247958.

The spelling of 1208689 in words is "one million, two hundred eight thousand, six hundred eighty-nine".