243297 has 8 divisors (see below), whose sum is σ = 360480. Its totient is φ = 162180.

The previous prime is 243263. The next prime is 243301. The reversal of 243297 is 792342.

It is not a de Polignac number, because 243297 - 2⁶ = 243233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9011 = 243297 / (2 + 4 + 3 + 2 + 9 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 243297.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243297.

It is not an unprimeable number, because it can be changed into a prime (243227) 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, 4479 + ... + 4532.

It is an arithmetic number, because the mean of its divisors is an integer number (45060).

2²⁴³²⁹⁷ is an apocalyptic number.

243297 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

243297 is a deficient number, since it is larger than the sum of its proper divisors (117183).

243297 is an equidigital number, since it uses as much as digits as its factorization.

243297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9020 (or 9014 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 243297 is about 493.2514571697. The cubic root of 243297 is about 62.4279275877.

It can be divided in two parts, 24329 and 7, that added together give a square (24336 = 156²).

The spelling of 243297 in words is "two hundred forty-three thousand, two hundred ninety-seven".