1668339 has 6 divisors (see below), whose sum is σ = 2409836. Its totient is φ = 1112220.

The previous prime is 1668323. The next prime is 1668347. The reversal of 1668339 is 9338661.

It is a happy number.

It is not a de Polignac number, because 1668339 - 2⁴ = 1668323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668319) 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 5 ways as a sum of consecutive naturals, for example, 92677 + ... + 92694.

2^1668339 is an apocalyptic number.

1668339 is a deficient number, since it is larger than the sum of its proper divisors (741497).

1668339 is a wasteful number, since it uses less digits than its factorization.

1668339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185377 (or 185374 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 1668339 is about 1291.6419782587. The cubic root of 1668339 is about 118.6027523019.

The spelling of 1668339 in words is "one million, six hundred sixty-eight thousand, three hundred thirty-nine".