43391039 has 2 divisors, whose sum is σ = 43391040. Its totient is φ = 43391038.

The previous prime is 43391027. The next prime is 43391053. The reversal of 43391039 is 93019334.

43391039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43391039 - 2¹² = 43386943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43390996 and 43391014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43391239) 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, 21695519 + 21695520.

It is an arithmetic number, because the mean of its divisors is an integer number (21695520).

Almost surely, 2^43391039 is an apocalyptic number.

43391039 is a deficient number, since it is larger than the sum of its proper divisors (1).

43391039 is an equidigital number, since it uses as much as digits as its factorization.

43391039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 43391039 is about 6587.1874878434. The cubic root of 43391039 is about 351.3985915727.

The spelling of 43391039 in words is "forty-three million, three hundred ninety-one thousand, thirty-nine".