243097 has 4 divisors (see below), whose sum is σ = 244240. Its totient is φ = 241956.

The previous prime is 243091. The next prime is 243101. The reversal of 243097 is 790342.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 243097 - 2¹¹ = 241049 is a prime.

It is a Duffinian number.

243097 is a lucky number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (243091) 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, 147 + ... + 712.

It is an arithmetic number, because the mean of its divisors is an integer number (61060).

2²⁴³⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

243097 is a deficient number, since it is larger than the sum of its proper divisors (1143).

243097 is an equidigital number, since it uses as much as digits as its factorization.

243097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 243097 is about 493.0486791383. The cubic root of 243097 is about 62.4108168022.

The spelling of 243097 in words is "two hundred forty-three thousand, ninety-seven".