243085881373 has 4 divisors (see below), whose sum is σ = 243093791068. Its totient is φ = 243077971680.

The previous prime is 243085881341. The next prime is 243085881377. The reversal of 243085881373 is 373188580342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 152495717049 + 90590164324 = 390507^2 + 300982^2 .

It is a cyclic number.

It is not a de Polignac number, because 243085881373 - 2⁵ = 243085881341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243085881373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243085881377) 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, 3908568 + ... + 3970273.

It is an arithmetic number, because the mean of its divisors is an integer number (60773447767).

Almost surely, 2^243085881373 is an apocalyptic number.

It is an amenable number.

243085881373 is a deficient number, since it is larger than the sum of its proper divisors (7909695).

243085881373 is an equidigital number, since it uses as much as digits as its factorization.

243085881373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7909694.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 243085881373 in words is "two hundred forty-three billion, eighty-five million, eight hundred eighty-one thousand, three hundred seventy-three".