243996297 has 4 divisors (see below), whose sum is σ = 325328400. Its totient is φ = 162664196.

The previous prime is 243996293. The next prime is 243996299. The reversal of 243996297 is 792699342.

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.

It is a cyclic number.

It is not a de Polignac number, because 243996297 - 2² = 243996293 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243996293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40666047 + ... + 40666052.

It is an arithmetic number, because the mean of its divisors is an integer number (81332100).

Almost surely, 2^243996297 is an apocalyptic number.

It is an amenable number.

243996297 is a deficient number, since it is larger than the sum of its proper divisors (81332103).

243996297 is an equidigital number, since it uses as much as digits as its factorization.

243996297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81332102.

The product of its digits is 1469664, while the sum is 51.

The square root of 243996297 is about 15620.3808212220. The cubic root of 243996297 is about 624.8768158293.

The spelling of 243996297 in words is "two hundred forty-three million, nine hundred ninety-six thousand, two hundred ninety-seven".