1688223 has 16 divisors (see below), whose sum is σ = 2407680. Its totient is φ = 1049664.

The previous prime is 1688213. The next prime is 1688231. The reversal of 1688223 is 3228861.

It is not a de Polignac number, because 1688223 - 2¹² = 1684127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2683 + ... + 3251.

It is an arithmetic number, because the mean of its divisors is an integer number (150480).

2^1688223 is an apocalyptic number.

1688223 is a deficient number, since it is larger than the sum of its proper divisors (719457).

1688223 is a wasteful number, since it uses less digits than its factorization.

1688223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638.

The product of its digits is 4608, while the sum is 30.

The square root of 1688223 is about 1299.3163587056. The cubic root of 1688223 is about 119.0720792990.

The spelling of 1688223 in words is "one million, six hundred eighty-eight thousand, two hundred twenty-three".