223987 has 4 divisors (see below), whose sum is σ = 229240. Its totient is φ = 218736.

The previous prime is 223969. The next prime is 223999. The reversal of 223987 is 789322.

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-223987 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 2¹⁷ + 9⁵ + 3⁵ + 8³ + 7³ .

It is a Duffinian number.

223987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (223087) 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, 2562 + ... + 2647.

It is an arithmetic number, because the mean of its divisors is an integer number (57310).

2²²³⁹⁸⁷ is an apocalyptic number.

223987 is a deficient number, since it is larger than the sum of its proper divisors (5253).

223987 is an equidigital number, since it uses as much as digits as its factorization.

223987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252.

The product of its digits is 6048, while the sum is 31.

The square root of 223987 is about 473.2726486921. The cubic root of 223987 is about 60.7306045441.

It can be divided in two parts, 2 and 23987, that multiplied together give a palindrome (47974).

The spelling of 223987 in words is "two hundred twenty-three thousand, nine hundred eighty-seven".