1689317 has 8 divisors (see below), whose sum is σ = 1938816. Its totient is φ = 1441872.

The previous prime is 1689287. The next prime is 1689319. The reversal of 1689317 is 7139861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1689317 - 2⁶ = 1689253 is a prime.

It is a d-powerful number, because it can be written as 1 + 6⁸ + 8 + 9³ + 3⁸ + 1 + 7⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2288 + ... + 2934.

It is an arithmetic number, because the mean of its divisors is an integer number (242352).

2^1689317 is an apocalyptic number.

It is an amenable number.

1689317 is a deficient number, since it is larger than the sum of its proper divisors (249499).

1689317 is an equidigital number, since it uses as much as digits as its factorization.

1689317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

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

The square root of 1689317 is about 1299.7372811457. The cubic root of 1689317 is about 119.0977940548.

The spelling of 1689317 in words is "one million, six hundred eighty-nine thousand, three hundred seventeen".