1689417 has 10 divisors (see below), whose sum is σ = 2523818. Its totient is φ = 1126224.

The previous prime is 1689397. The next prime is 1689431. The reversal of 1689417 is 7149861.

It can be written as a sum of positive squares in only one way, i.e., 1679616 + 9801 = 1296^2 + 99^2 .

It is not a de Polignac number, because 1689417 - 2⁶ = 1689353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1689437) 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 in 9 ways as a sum of consecutive naturals, for example, 10348 + ... + 10509.

2^1689417 is an apocalyptic number.

It is an amenable number.

1689417 is a deficient number, since it is larger than the sum of its proper divisors (834401).

1689417 is an equidigital number, since it uses as much as digits as its factorization.

1689417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20869 (or 20860 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1689417 is about 1299.7757498892. The cubic root of 1689417 is about 119.1001440271.

The spelling of 1689417 in words is "one million, six hundred eighty-nine thousand, four hundred seventeen".