243498313 has 4 divisors (see below), whose sum is σ = 243877648. Its totient is φ = 243118980.

The previous prime is 243498247. The next prime is 243498317. The reversal of 243498313 is 313894342.

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: 313894342 = 2 ⋅156947171.

It is a cyclic number.

It is not a de Polignac number, because 243498313 - 2⁹ = 243497801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243498317) 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, 188703 + ... + 189988.

It is an arithmetic number, because the mean of its divisors is an integer number (60969412).

Almost surely, 2^243498313 is an apocalyptic number.

It is an amenable number.

243498313 is a deficient number, since it is larger than the sum of its proper divisors (379335).

243498313 is an equidigital number, since it uses as much as digits as its factorization.

243498313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379334.

The product of its digits is 62208, while the sum is 37.

The square root of 243498313 is about 15604.4324792669. The cubic root of 243498313 is about 624.4514123835.

The spelling of 243498313 in words is "two hundred forty-three million, four hundred ninety-eight thousand, three hundred thirteen".