1668317 has 4 divisors (see below), whose sum is σ = 1906656. Its totient is φ = 1429980.

The previous prime is 1668313. The next prime is 1668319. The reversal of 1668317 is 7138661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1668317 - 2² = 1668313 is a prime.

It is a super-2 number, since 2×1668317² = 5566563224978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668313) 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, 119159 + ... + 119172.

It is an arithmetic number, because the mean of its divisors is an integer number (476664).

2^1668317 is an apocalyptic number.

It is an amenable number.

1668317 is a deficient number, since it is larger than the sum of its proper divisors (238339).

1668317 is an equidigital number, since it uses as much as digits as its factorization.

1668317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238338.

The product of its digits is 6048, while the sum is 32.

The square root of 1668317 is about 1291.6334619388. The cubic root of 1668317 is about 118.6022309706.

The spelling of 1668317 in words is "one million, six hundred sixty-eight thousand, three hundred seventeen".