1668873 has 16 divisors (see below), whose sum is σ = 2414016. Its totient is φ = 1021440.

The previous prime is 1668869. The next prime is 1668883. The reversal of 1668873 is 3788661.

It is not a de Polignac number, because 1668873 - 2² = 1668869 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1668803) 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 15 ways as a sum of consecutive naturals, for example, 1813 + ... + 2573.

It is an arithmetic number, because the mean of its divisors is an integer number (150876).

2^1668873 is an apocalyptic number.

It is an amenable number.

1668873 is a deficient number, since it is larger than the sum of its proper divisors (745143).

1668873 is a wasteful number, since it uses less digits than its factorization.

1668873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824.

The product of its digits is 48384, while the sum is 39.

The square root of 1668873 is about 1291.8486753486. The cubic root of 1668873 is about 118.6154050289.

It can be divided in two parts, 16688 and 73, that added together give a palindrome (16761).

The spelling of 1668873 in words is "one million, six hundred sixty-eight thousand, eight hundred seventy-three".