1740689 has 2 divisors, whose sum is σ = 1740690. Its totient is φ = 1740688.

The previous prime is 1740649. The next prime is 1740691. The reversal of 1740689 is 9860471.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 966289 + 774400 = 983^2 + 880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1740689 is a prime.

Together with 1740691, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1740649) 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, 870344 + 870345.

It is an arithmetic number, because the mean of its divisors is an integer number (870345).

2^1740689 is an apocalyptic number.

It is an amenable number.

1740689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1740689 is an equidigital number, since it uses as much as digits as its factorization.

1740689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1740689 is about 1319.3517347546. The cubic root of 1740689 is about 120.2930108084.

The spelling of 1740689 in words is "one million, seven hundred forty thousand, six hundred eighty-nine".