43894369 has 2 divisors, whose sum is σ = 43894370. Its totient is φ = 43894368.

The previous prime is 43894349. The next prime is 43894379. The reversal of 43894369 is 96349834.

43894369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40960000 + 2934369 = 6400^2 + 1713^2 .

It is a cyclic number.

It is not a de Polignac number, because 43894369 - 2¹⁷ = 43763297 is a prime.

It is a super-2 number, since 2×43894369² = 3853431259816322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (43894339) 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, 21947184 + 21947185.

It is an arithmetic number, because the mean of its divisors is an integer number (21947185).

Almost surely, 2^43894369 is an apocalyptic number.

It is an amenable number.

43894369 is a deficient number, since it is larger than the sum of its proper divisors (1).

43894369 is an equidigital number, since it uses as much as digits as its factorization.

43894369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 46.

The square root of 43894369 is about 6625.2825600121. The cubic root of 43894369 is about 352.7520963791.

The spelling of 43894369 in words is "forty-three million, eight hundred ninety-four thousand, three hundred sixty-nine".