1318789 has 2 divisors, whose sum is σ = 1318790. Its totient is φ = 1318788.

The previous prime is 1318783. The next prime is 1318829. The reversal of 1318789 is 9878131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1144900 + 173889 = 1070^2 + 417^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318789 - 2³ = 1318781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659394 + 659395.

It is an arithmetic number, because the mean of its divisors is an integer number (659395).

2^1318789 is an apocalyptic number.

It is an amenable number.

1318789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318789 is an equidigital number, since it uses as much as digits as its factorization.

1318789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 37.

The square root of 1318789 is about 1148.3853882735. The cubic root of 1318789 is about 109.6625748215.

The spelling of 1318789 in words is "one million, three hundred eighteen thousand, seven hundred eighty-nine".