43344139 has 2 divisors, whose sum is σ = 43344140. Its totient is φ = 43344138.

The previous prime is 43344127. The next prime is 43344143. The reversal of 43344139 is 93144334.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43344139 - 2¹⁹ = 42819851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43344139.

It is not a weakly prime, because it can be changed into another prime (43344179) 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, 21672069 + 21672070.

It is an arithmetic number, because the mean of its divisors is an integer number (21672070).

Almost surely, 2^43344139 is an apocalyptic number.

43344139 is a deficient number, since it is larger than the sum of its proper divisors (1).

43344139 is an equidigital number, since it uses as much as digits as its factorization.

43344139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 31.

The square root of 43344139 is about 6583.6265841860. The cubic root of 43344139 is about 351.2719407274.

The spelling of 43344139 in words is "forty-three million, three hundred forty-four thousand, one hundred thirty-nine".