1668353 has 4 divisors (see below), whose sum is σ = 1679700. Its totient is φ = 1657008.

The previous prime is 1668347. The next prime is 1668361. The reversal of 1668353 is 3538661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3538661 = 7 ⋅505523.

It can be written as a sum of positive squares in 2 ways, for example, as 283024 + 1385329 = 532^2 + 1177^2 .

It is a cyclic number.

It is not a de Polignac number, because 1668353 - 2¹⁰ = 1667329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5450 + ... + 5747.

It is an arithmetic number, because the mean of its divisors is an integer number (419925).

2^1668353 is an apocalyptic number.

It is an amenable number.

1668353 is a deficient number, since it is larger than the sum of its proper divisors (11347).

1668353 is a wasteful number, since it uses less digits than its factorization.

1668353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11346.

The product of its digits is 12960, while the sum is 32.

The square root of 1668353 is about 1291.6473977057. The cubic root of 1668353 is about 118.6030840558.

The spelling of 1668353 in words is "one million, six hundred sixty-eight thousand, three hundred fifty-three".