657223 has 4 divisors (see below), whose sum is σ = 751120. Its totient is φ = 563328.

The previous prime is 657197. The next prime is 657233. The reversal of 657223 is 322756.

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-657223 is a prime.

It is a d-powerful number, because it can be written as 6 + 5⁸ + 2¹² + 7³ + 2¹⁸ + 3² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657233) 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, 46938 + ... + 46951.

It is an arithmetic number, because the mean of its divisors is an integer number (187780).

2⁶⁵⁷²²³ is an apocalyptic number.

657223 is a deficient number, since it is larger than the sum of its proper divisors (93897).

657223 is an equidigital number, since it uses as much as digits as its factorization.

657223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93896.

The product of its digits is 2520, while the sum is 25.

The square root of 657223 is about 810.6929135005. The cubic root of 657223 is about 86.9435931540.

Adding to 657223 its reverse (322756), we get a palindrome (979979).

The spelling of 657223 in words is "six hundred fifty-seven thousand, two hundred twenty-three".