243506713 has 4 divisors (see below), whose sum is σ = 243630288. Its totient is φ = 243383140.

The previous prime is 243506701. The next prime is 243506719. The reversal of 243506713 is 317605342.

243506713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an emirpimes, since its reverse is a distinct semiprime: 317605342 = 2 ⋅158802671.

It is a cyclic number.

It is not a de Polignac number, because 243506713 - 2²¹ = 241409561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243506719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58783 + ... + 62788.

It is an arithmetic number, because the mean of its divisors is an integer number (60907572).

Almost surely, 2^243506713 is an apocalyptic number.

It is an amenable number.

243506713 is a deficient number, since it is larger than the sum of its proper divisors (123575).

243506713 is a wasteful number, since it uses less digits than its factorization.

243506713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123574.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 243506713 is about 15604.7016312392. The cubic root of 243506713 is about 624.4585929008.

The spelling of 243506713 in words is "two hundred forty-three million, five hundred six thousand, seven hundred thirteen".