1689307 has 4 divisors (see below), whose sum is σ = 1788696. Its totient is φ = 1589920.

The previous prime is 1689287. The next prime is 1689319. The reversal of 1689307 is 7039861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1689307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1689367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49669 + ... + 49702.

It is an arithmetic number, because the mean of its divisors is an integer number (447174).

2^1689307 is an apocalyptic number.

1689307 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1689307 is a deficient number, since it is larger than the sum of its proper divisors (99389).

1689307 is an equidigital number, since it uses as much as digits as its factorization.

1689307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99388.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1689307 is about 1299.7334342087. The cubic root of 1689307 is about 119.0975590525.

The spelling of 1689307 in words is "one million, six hundred eighty-nine thousand, three hundred seven".