243967 has 8 divisors (see below), whose sum is σ = 262656. Its totient is φ = 225792.

The previous prime is 243953. The next prime is 243973. The reversal of 243967 is 769342.

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

It is a cyclic number.

It is not a de Polignac number, because 243967 - 2⁷ = 243839 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁹ + 4⁸ + 9³ + 3¹¹ + 6² + 7 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243917) 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, 1858 + ... + 1984.

It is an arithmetic number, because the mean of its divisors is an integer number (32832).

2²⁴³⁹⁶⁷ is an apocalyptic number.

243967 is a deficient number, since it is larger than the sum of its proper divisors (18689).

243967 is a wasteful number, since it uses less digits than its factorization.

243967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257.

The product of its digits is 9072, while the sum is 31.

The square root of 243967 is about 493.9301570060. The cubic root of 243967 is about 62.4851804864.

The spelling of 243967 in words is "two hundred forty-three thousand, nine hundred sixty-seven".