320688223 has 4 divisors (see below), whose sum is σ = 322316280. Its totient is φ = 319060168.

The previous prime is 320688217. The next prime is 320688227. The reversal of 320688223 is 322886023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320688223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320688227) 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, 813733 + ... + 814126.

It is an arithmetic number, because the mean of its divisors is an integer number (80579070).

Almost surely, 2^320688223 is an apocalyptic number.

320688223 is a deficient number, since it is larger than the sum of its proper divisors (1628057).

320688223 is a wasteful number, since it uses less digits than its factorization.

320688223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628056.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 320688223 is about 17907.7699058258. The cubic root of 320688223 is about 684.4803795472.

The spelling of 320688223 in words is "three hundred twenty million, six hundred eighty-eight thousand, two hundred twenty-three".