243717387473 has 16 divisors (see below), whose sum is σ = 290942012160. Its totient is φ = 199613331456.

The previous prime is 243717387467. The next prime is 243717387491. The reversal of 243717387473 is 374783717342.

243717387473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243717387473 - 2⁸ = 243717387217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243717387773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617408 + ... + 932001.

It is an arithmetic number, because the mean of its divisors is an integer number (18183875760).

Almost surely, 2^243717387473 is an apocalyptic number.

243717387473 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

243717387473 is a deficient number, since it is larger than the sum of its proper divisors (47224624687).

243717387473 is a wasteful number, since it uses less digits than its factorization.

243717387473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550416.

The product of its digits is 16595712, while the sum is 56.

The spelling of 243717387473 in words is "two hundred forty-three billion, seven hundred seventeen million, three hundred eighty-seven thousand, four hundred seventy-three".