1709489 has 2 divisors, whose sum is σ = 1709490. Its totient is φ = 1709488.

The previous prime is 1709483. The next prime is 1709497. The reversal of 1709489 is 9849071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 935089 + 774400 = 967^2 + 880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1709489 - 2⁴ = 1709473 is a prime.

It is a super-2 number, since 2×1709489² = 5844705282242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1709483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 854744 + 854745.

It is an arithmetic number, because the mean of its divisors is an integer number (854745).

2^1709489 is an apocalyptic number.

It is an amenable number.

1709489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1709489 is an equidigital number, since it uses as much as digits as its factorization.

1709489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1709489 is about 1307.4742827299. The cubic root of 1709489 is about 119.5699653891.

The spelling of 1709489 in words is "one million, seven hundred nine thousand, four hundred eighty-nine".