4208689 has 2 divisors, whose sum is σ = 4208690. Its totient is φ = 4208688.

The previous prime is 4208657. The next prime is 4208717. The reversal of 4208689 is 9868024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4161600 + 47089 = 2040^2 + 217^2 .

It is a cyclic number.

It is not a de Polignac number, because 4208689 - 2⁵ = 4208657 is a prime.

It is a d-powerful number, because it can be written as 4¹¹ + 2⁵ + 0 + 8 + 6⁵ + 8 + 9⁴ .

4208689 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4208629) 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, 2104344 + 2104345.

It is an arithmetic number, because the mean of its divisors is an integer number (2104345).

Almost surely, 2^4208689 is an apocalyptic number.

It is an amenable number.

4208689 is a deficient number, since it is larger than the sum of its proper divisors (1).

4208689 is an equidigital number, since it uses as much as digits as its factorization.

4208689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 4208689 is about 2051.5089568413. The cubic root of 4208689 is about 161.4540505151.

The spelling of 4208689 in words is "four million, two hundred eight thousand, six hundred eighty-nine".