223949 has 4 divisors (see below), whose sum is σ = 244320. Its totient is φ = 203580.

The previous prime is 223939. The next prime is 223963. The reversal of 223949 is 949322.

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-223949 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 2¹⁷ + 9 + 3³ + 4⁵ + 9⁵ .

It is a Duffinian number.

It is a plaindrome in base 6 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223919) 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, 10169 + ... + 10190.

It is an arithmetic number, because the mean of its divisors is an integer number (61080).

2²²³⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

223949 is a deficient number, since it is larger than the sum of its proper divisors (20371).

223949 is a wasteful number, since it uses less digits than its factorization.

223949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20370.

The product of its digits is 3888, while the sum is 29.

The square root of 223949 is about 473.2325009971. The cubic root of 223949 is about 60.7271699794.

The spelling of 223949 in words is "two hundred twenty-three thousand, nine hundred forty-nine".