243929 has 4 divisors (see below), whose sum is σ = 278784. Its totient is φ = 209076.

The previous prime is 243917. The next prime is 243931. The reversal of 243929 is 929342.

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 not a de Polignac number, because 243929 - 2⁸ = 243673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243989) 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, 17417 + ... + 17430.

It is an arithmetic number, because the mean of its divisors is an integer number (69696).

2²⁴³⁹²⁹ is an apocalyptic number.

It is an amenable number.

243929 is a deficient number, since it is larger than the sum of its proper divisors (34855).

243929 is an equidigital number, since it uses as much as digits as its factorization.

243929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34854.

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

The square root of 243929 is about 493.8916885310. The cubic root of 243929 is about 62.4819361130.

The spelling of 243929 in words is "two hundred forty-three thousand, nine hundred twenty-nine".