243313867 has 4 divisors (see below), whose sum is σ = 256119880. Its totient is φ = 230507856.

The previous prime is 243313793. The next prime is 243313879. The reversal of 243313867 is 768313342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768313342 = 2 ⋅384156671.

It is a cyclic number.

It is not a de Polignac number, because 243313867 - 2¹⁹ = 242789579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243313267) 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, 6402978 + ... + 6403015.

It is an arithmetic number, because the mean of its divisors is an integer number (64029970).

Almost surely, 2^243313867 is an apocalyptic number.

243313867 is a deficient number, since it is larger than the sum of its proper divisors (12806013).

243313867 is a wasteful number, since it uses less digits than its factorization.

243313867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12806012.

The product of its digits is 72576, while the sum is 37.

The square root of 243313867 is about 15598.5213081240. The cubic root of 243313867 is about 624.2937019696.

The spelling of 243313867 in words is "two hundred forty-three million, three hundred thirteen thousand, eight hundred sixty-seven".