243793121 has 8 divisors (see below), whose sum is σ = 286414464. Its totient is φ = 204581520.

The previous prime is 243793103. The next prime is 243793127. The reversal of 243793121 is 121397342.

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

It is not a de Polignac number, because 243793121 - 2¹⁸ = 243530977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243793127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 852281 + ... + 852566.

It is an arithmetic number, because the mean of its divisors is an integer number (35801808).

Almost surely, 2^243793121 is an apocalyptic number.

It is an amenable number.

243793121 is a deficient number, since it is larger than the sum of its proper divisors (42621343).

243793121 is a wasteful number, since it uses less digits than its factorization.

243793121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704871.

The product of its digits is 9072, while the sum is 32.

The square root of 243793121 is about 15613.8759121494. The cubic root of 243793121 is about 624.7033224475.

The spelling of 243793121 in words is "two hundred forty-three million, seven hundred ninety-three thousand, one hundred twenty-one".