243969 has 8 divisors (see below), whose sum is σ = 354912. Its totient is φ = 147840.

The previous prime is 243953. The next prime is 243973. The reversal of 243969 is 969342.

243969 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243969 - 2⁴ = 243953 is a prime.

It is a super-2 number, since 2×243969² = 119041745922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 7393 = 243969 / (2 + 4 + 3 + 9 + 6 + 9).

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁹ + 4⁸ + 9 + 3¹¹ + 6² + 9³ .

243969 is strictly pandigital in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243969.

It is not an unprimeable number, because it can be changed into a prime (243989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3664 + ... + 3729.

It is an arithmetic number, because the mean of its divisors is an integer number (44364).

2²⁴³⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

243969 is a deficient number, since it is larger than the sum of its proper divisors (110943).

243969 is a wasteful number, since it uses less digits than its factorization.

243969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7407.

The product of its digits is 11664, while the sum is 33.

The square root of 243969 is about 493.9321815796. The cubic root of 243969 is about 62.4853512336.

It can be divided in two parts, 24 and 3969, that added together give a palindrome (3993).

The spelling of 243969 in words is "two hundred forty-three thousand, nine hundred sixty-nine".