1318845589 has 2 divisors, whose sum is σ = 1318845590. Its totient is φ = 1318845588.

The previous prime is 1318845581. The next prime is 1318845607. The reversal of 1318845589 is 9855488131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 730783089 + 588062500 = 27033^2 + 24250^2 .

It is an emirp because it is prime and its reverse (9855488131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318845589 - 2³ = 1318845581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318845581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659422794 + 659422795.

It is an arithmetic number, because the mean of its divisors is an integer number (659422795).

Almost surely, 2^1318845589 is an apocalyptic number.

It is an amenable number.

1318845589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318845589 is an equidigital number, since it uses as much as digits as its factorization.

1318845589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 52.

The square root of 1318845589 is about 36315.9137156151. The cubic root of 1318845589 is about 1096.6414333287.

The spelling of 1318845589 in words is "one billion, three hundred eighteen million, eight hundred forty-five thousand, five hundred eighty-nine".