243473 has 2 divisors, whose sum is σ = 243474. Its totient is φ = 243472.

The previous prime is 243469. The next prime is 243479. The reversal of 243473 is 374342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238144 + 5329 = 488^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 243473 - 2² = 243469 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2³ + 4 + 4⁸ + 3⁶ + 7² + 3¹¹ .

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (243479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121736 + 121737.

It is an arithmetic number, because the mean of its divisors is an integer number (121737).

2²⁴³⁴⁷³ is an apocalyptic number.

It is an amenable number.

243473 is a deficient number, since it is larger than the sum of its proper divisors (1).

243473 is an equidigital number, since it uses as much as digits as its factorization.

243473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 23.

The square root of 243473 is about 493.4298329043. The cubic root of 243473 is about 62.4429773238.

The spelling of 243473 in words is "two hundred forty-three thousand, four hundred seventy-three", and thus it is an iban number.