223969 has 2 divisors, whose sum is σ = 223970. Its totient is φ = 223968.

The previous prime is 223963. The next prime is 223999. The reversal of 223969 is 969322.

223969 is nontrivially palindromic in base 15.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216225 + 7744 = 465^2 + 88^2 .

It is a cyclic number.

It is not a de Polignac number, because 223969 - 2⁷ = 223841 is a prime.

It is a super-2 number, since 2×223969² = 100324225922, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2 + 2 + 9² + 3¹¹ + 6⁶ + 9² .

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 223969.

It is not a weakly prime, because it can be changed into another prime (223963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111984 + 111985.

It is an arithmetic number, because the mean of its divisors is an integer number (111985).

2²²³⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

223969 is a deficient number, since it is larger than the sum of its proper divisors (1).

223969 is an equidigital number, since it uses as much as digits as its factorization.

223969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 31.

The square root of 223969 is about 473.2536317874. The cubic root of 223969 is about 60.7289776934.

The spelling of 223969 in words is "two hundred twenty-three thousand, nine hundred sixty-nine".