243437 has 2 divisors, whose sum is σ = 243438. Its totient is φ = 243436.

The previous prime is 243433. The next prime is 243461. The reversal of 243437 is 734342.

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., 198916 + 44521 = 446^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 243437 - 2² = 243433 is a prime.

It is a d-powerful number, because it can be written as 2 + 4² + 4⁸ + 3⁶ + 3¹¹ + 7 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121718 + 121719.

It is an arithmetic number, because the mean of its divisors is an integer number (121719).

2²⁴³⁴³⁷ is an apocalyptic number.

It is an amenable number.

243437 is a deficient number, since it is larger than the sum of its proper divisors (1).

243437 is an equidigital number, since it uses as much as digits as its factorization.

243437 is an odious number, because the sum of its binary digits is odd.

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

The square root of 243437 is about 493.3933522049. The cubic root of 243437 is about 62.4398995588.

Adding to 243437 its reverse (734342), we get a palindrome (977779).

The spelling of 243437 in words is "two hundred forty-three thousand, four hundred thirty-seven".