43339939 has 4 divisors (see below), whose sum is σ = 43379656. Its totient is φ = 43300224.

The previous prime is 43339937. The next prime is 43339957. The reversal of 43339939 is 93993334.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43339939 - 2¹ = 43339937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43339895 and 43339904.

It is not an unprimeable number, because it can be changed into a prime (43339937) 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 in 3 ways as a sum of consecutive naturals, for example, 18174 + ... + 20419.

It is an arithmetic number, because the mean of its divisors is an integer number (10844914).

Almost surely, 2^43339939 is an apocalyptic number.

43339939 is a deficient number, since it is larger than the sum of its proper divisors (39717).

43339939 is a wasteful number, since it uses less digits than its factorization.

43339939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39716.

The product of its digits is 236196, while the sum is 43.

The square root of 43339939 is about 6583.3076033252. The cubic root of 43339939 is about 351.2605944044.

The spelling of 43339939 in words is "forty-three million, three hundred thirty-nine thousand, nine hundred thirty-nine".