229987 has 4 divisors (see below), whose sum is σ = 232456. Its totient is φ = 227520.

The previous prime is 229981. The next prime is 230003. The reversal of 229987 is 789922.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 229987 - 2³ = 229979 is a prime.

It is a Duffinian number.

229987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (229981) 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, 1089 + ... + 1282.

It is an arithmetic number, because the mean of its divisors is an integer number (58114).

2²²⁹⁹⁸⁷ is an apocalyptic number.

229987 is a deficient number, since it is larger than the sum of its proper divisors (2469).

229987 is an equidigital number, since it uses as much as digits as its factorization.

229987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468.

The product of its digits is 18144, while the sum is 37.

The square root of 229987 is about 479.5695987028. The cubic root of 229987 is about 61.2681023822.

It can be divided in two parts, 22998 and 7, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 229987 in words is "two hundred twenty-nine thousand, nine hundred eighty-seven".