223997 has 4 divisors (see below), whose sum is σ = 233760. Its totient is φ = 214236.

The previous prime is 223969. The next prime is 223999. The reversal of 223997 is 799322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223997 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 (223999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4847 + ... + 4892.

It is an arithmetic number, because the mean of its divisors is an integer number (58440).

2²²³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

223997 is a deficient number, since it is larger than the sum of its proper divisors (9763).

223997 is an equidigital number, since it uses as much as digits as its factorization.

223997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9762.

The product of its digits is 6804, while the sum is 32.

The square root of 223997 is about 473.2832133089. The cubic root of 223997 is about 60.7315083123.

The spelling of 223997 in words is "two hundred twenty-three thousand, nine hundred ninety-seven".