243099 has 6 divisors (see below), whose sum is σ = 351156. Its totient is φ = 162060.

The previous prime is 243091. The next prime is 243101. The reversal of 243099 is 990342.

It is not a de Polignac number, because 243099 - 2³ = 243091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13497 + ... + 13514.

It is an arithmetic number, because the mean of its divisors is an integer number (58526).

2²⁴³⁰⁹⁹ is an apocalyptic number.

243099 is a deficient number, since it is larger than the sum of its proper divisors (108057).

243099 is a wasteful number, since it uses less digits than its factorization.

243099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27017 (or 27014 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 243099 is about 493.0507073314. The cubic root of 243099 is about 62.4109879565.

The spelling of 243099 in words is "two hundred forty-three thousand, ninety-nine".