1606289 has 2 divisors, whose sum is σ = 1606290. Its totient is φ = 1606288.

The previous prime is 1606277. The next prime is 1606291. The reversal of 1606289 is 9826061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 966289 + 640000 = 983^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606289 - 2⁴ = 1606273 is a prime.

Together with 1606291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1606249) 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, 803144 + 803145.

It is an arithmetic number, because the mean of its divisors is an integer number (803145).

2^1606289 is an apocalyptic number.

It is an amenable number.

1606289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606289 is an equidigital number, since it uses as much as digits as its factorization.

1606289 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 1606289 is about 1267.3945715522. The cubic root of 1606289 is about 117.1137520820.

The spelling of 1606289 in words is "one million, six hundred six thousand, two hundred eighty-nine".