243371393 has 12 divisors (see below), whose sum is σ = 254485140. Its totient is φ = 232465632.

The previous prime is 243371339. The next prime is 243371411. The reversal of 243371393 is 393173342.

It can be written as a sum of positive squares in 2 ways, for example, as 196476289 + 46895104 = 14017^2 + 6848^2 .

It is not a de Polignac number, because 243371393 - 2⁶ = 243371329 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 (243371693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331655 + ... + 332387.

It is an arithmetic number, because the mean of its divisors is an integer number (21207095).

Almost surely, 2^243371393 is an apocalyptic number.

It is an amenable number.

243371393 is a deficient number, since it is larger than the sum of its proper divisors (11113747).

243371393 is an equidigital number, since it uses as much as digits as its factorization.

243371393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 869 counting only the distinct ones).

The product of its digits is 40824, while the sum is 35.

The square root of 243371393 is about 15600.3651559827. The cubic root of 243371393 is about 624.3428980828.

The spelling of 243371393 in words is "two hundred forty-three million, three hundred seventy-one thousand, three hundred ninety-three".