1791089 has 2 divisors, whose sum is σ = 1791090. Its totient is φ = 1791088.

The previous prime is 1791077. The next prime is 1791091. The reversal of 1791089 is 9801971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123600 + 667489 = 1060^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 1791089 - 2²⁰ = 742513 is a prime.

It is a Sophie Germain prime.

Together with 1791091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1791019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895544 + 895545.

It is an arithmetic number, because the mean of its divisors is an integer number (895545).

2^1791089 is an apocalyptic number.

It is an amenable number.

1791089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1791089 is an equidigital number, since it uses as much as digits as its factorization.

1791089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 1791089 is about 1338.3157325534. The cubic root of 1791089 is about 121.4429725546.

The spelling of 1791089 in words is "one million, seven hundred ninety-one thousand, eighty-nine".