1606289989 has 2 divisors, whose sum is σ = 1606289990. Its totient is φ = 1606289988.

The previous prime is 1606289969. The next prime is 1606290041. The reversal of 1606289989 is 9899826061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1605204225 + 1085764 = 40065^2 + 1042^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606289989 - 2⁵ = 1606289957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606289969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803144994 + 803144995.

It is an arithmetic number, because the mean of its divisors is an integer number (803144995).

Almost surely, 2^1606289989 is an apocalyptic number.

It is an amenable number.

1606289989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606289989 is an equidigital number, since it uses as much as digits as its factorization.

1606289989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 58.

The square root of 1606289989 is about 40078.5477406555. The cubic root of 1606289989 is about 1171.1377611782.

The spelling of 1606289989 in words is "one billion, six hundred six million, two hundred eighty-nine thousand, nine hundred eighty-nine".