43418449 has 2 divisors, whose sum is σ = 43418450. Its totient is φ = 43418448.

The previous prime is 43418447. The next prime is 43418579. The reversal of 43418449 is 94481434.

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., 33558849 + 9859600 = 5793^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 43418449 - 2¹ = 43418447 is a prime.

Together with 43418447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43418443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21709224 + 21709225.

It is an arithmetic number, because the mean of its divisors is an integer number (21709225).

Almost surely, 2^43418449 is an apocalyptic number.

It is an amenable number.

43418449 is a deficient number, since it is larger than the sum of its proper divisors (1).

43418449 is an equidigital number, since it uses as much as digits as its factorization.

43418449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 37.

The square root of 43418449 is about 6589.2677134868. The cubic root of 43418449 is about 351.4725685058.

The spelling of 43418449 in words is "forty-three million, four hundred eighteen thousand, four hundred forty-nine".