243120717193 has 4 divisors (see below), whose sum is σ = 243173084688. Its totient is φ = 243068349700.

The previous prime is 243120717173. The next prime is 243120717197. The reversal of 243120717193 is 391717021342.

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 243120717193 - 2²⁵ = 243087162761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243120717197) 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, 26176783 + ... + 26186068.

It is an arithmetic number, because the mean of its divisors is an integer number (60793271172).

Almost surely, 2^243120717193 is an apocalyptic number.

It is an amenable number.

243120717193 is a deficient number, since it is larger than the sum of its proper divisors (52367495).

243120717193 is an equidigital number, since it uses as much as digits as its factorization.

243120717193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52367494.

The product of its (nonzero) digits is 63504, while the sum is 40.

The spelling of 243120717193 in words is "two hundred forty-three billion, one hundred twenty million, seven hundred seventeen thousand, one hundred ninety-three".