223957 has 4 divisors (see below), whose sum is σ = 225036. Its totient is φ = 222880.

The previous prime is 223939. The next prime is 223963. The reversal of 223957 is 759322.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 130321 + 93636 = 361^2 + 306^2 .

It is a cyclic number.

It is not a de Polignac number, because 223957 - 2⁷ = 223829 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223757) 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 3 ways as a sum of consecutive naturals, for example, 118 + ... + 679.

It is an arithmetic number, because the mean of its divisors is an integer number (56259).

2²²³⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

223957 is a deficient number, since it is larger than the sum of its proper divisors (1079).

223957 is an equidigital number, since it uses as much as digits as its factorization.

223957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078.

The product of its digits is 3780, while the sum is 28.

The square root of 223957 is about 473.2409534265. The cubic root of 223957 is about 60.7278930779.

The spelling of 223957 in words is "two hundred twenty-three thousand, nine hundred fifty-seven".