1716389 has 2 divisors, whose sum is σ = 1716390. Its totient is φ = 1716388.

The previous prime is 1716367. The next prime is 1716391. The reversal of 1716389 is 9836171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1716100 + 289 = 1310^2 + 17^2 .

It is an emirp because it is prime and its reverse (9836171) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1716389 is a prime.

Together with 1716391, 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 (1716359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 858194 + 858195.

It is an arithmetic number, because the mean of its divisors is an integer number (858195).

2^1716389 is an apocalyptic number.

It is an amenable number.

1716389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1716389 is an equidigital number, since it uses as much as digits as its factorization.

1716389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 1716389 is about 1310.1103006999. The cubic root of 1716389 is about 119.7306226028.

The spelling of 1716389 in words is "one million, seven hundred sixteen thousand, three hundred eighty-nine".