43945339 has 2 divisors, whose sum is σ = 43945340. Its totient is φ = 43945338.

The previous prime is 43945337. The next prime is 43945373. The reversal of 43945339 is 93354934.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43945339 - 2¹ = 43945337 is a prime.

Together with 43945337, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43945333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21972669 + 21972670.

It is an arithmetic number, because the mean of its divisors is an integer number (21972670).

Almost surely, 2^43945339 is an apocalyptic number.

43945339 is a deficient number, since it is larger than the sum of its proper divisors (1).

43945339 is an equidigital number, since it uses as much as digits as its factorization.

43945339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 40.

The square root of 43945339 is about 6629.1280723787. The cubic root of 43945339 is about 352.8885817636. Note that the first 3 decimals are identical.

The spelling of 43945339 in words is "forty-three million, nine hundred forty-five thousand, three hundred thirty-nine".