243713917 has 4 divisors (see below), whose sum is σ = 243806656. Its totient is φ = 243621180.

The previous prime is 243713839. The next prime is 243713927. The reversal of 243713917 is 719317342.

It is a happy number.

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 243713917 - 2¹¹ = 243711869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243713927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42309 + ... + 47722.

It is an arithmetic number, because the mean of its divisors is an integer number (60951664).

Almost surely, 2^243713917 is an apocalyptic number.

It is an amenable number.

243713917 is a deficient number, since it is larger than the sum of its proper divisors (92739).

243713917 is an equidigital number, since it uses as much as digits as its factorization.

243713917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92738.

The product of its digits is 31752, while the sum is 37.

The square root of 243713917 is about 15611.3393723921. The cubic root of 243713917 is about 624.6356634955.

The spelling of 243713917 in words is "two hundred forty-three million, seven hundred thirteen thousand, nine hundred seventeen".