1018489 has 2 divisors, whose sum is σ = 1018490. Its totient is φ = 1018488.

The previous prime is 1018477. The next prime is 1018513. The reversal of 1018489 is 9848101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1010025 + 8464 = 1005^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 1018489 - 2¹¹ = 1016441 is a prime.

1018489 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1018489.

It is not a weakly prime, because it can be changed into another prime (1018429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509244 + 509245.

It is an arithmetic number, because the mean of its divisors is an integer number (509245).

2^1018489 is an apocalyptic number.

It is an amenable number.

1018489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018489 is an equidigital number, since it uses as much as digits as its factorization.

1018489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1018489 is about 1009.2021601245. The cubic root of 1018489 is about 100.6125402831.

The spelling of 1018489 in words is "one million, eighteen thousand, four hundred eighty-nine".