1081789 has 2 divisors, whose sum is σ = 1081790. Its totient is φ = 1081788.

The previous prime is 1081781. The next prime is 1081793. The reversal of 1081789 is 9871801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 917764 + 164025 = 958^2 + 405^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081789 - 2³ = 1081781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540894 + 540895.

It is an arithmetic number, because the mean of its divisors is an integer number (540895).

2^1081789 is an apocalyptic number.

It is an amenable number.

1081789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081789 is an equidigital number, since it uses as much as digits as its factorization.

1081789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 1081789 is about 1040.0908614155. The cubic root of 1081789 is about 102.6551764188.

The spelling of 1081789 in words is "one million, eighty-one thousand, seven hundred eighty-nine".