243845473 has 4 divisors (see below), whose sum is σ = 251711488. Its totient is φ = 235979460.

The previous prime is 243845431. The next prime is 243845479. The reversal of 243845473 is 374548342.

It is a happy number.

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 243845473 - 2⁹ = 243844961 is a prime.

It is a super-2 number, since 2×243845473² = 118921229405187458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243845479) 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, 3932961 + ... + 3933022.

It is an arithmetic number, because the mean of its divisors is an integer number (62927872).

Almost surely, 2^243845473 is an apocalyptic number.

It is an amenable number.

243845473 is a deficient number, since it is larger than the sum of its proper divisors (7866015).

243845473 is an equidigital number, since it uses as much as digits as its factorization.

243845473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7866014.

The product of its digits is 322560, while the sum is 40.

The square root of 243845473 is about 15615.5522796986. The cubic root of 243845473 is about 624.7480353958.

The spelling of 243845473 in words is "two hundred forty-three million, eight hundred forty-five thousand, four hundred seventy-three".