43940063 has 2 divisors, whose sum is σ = 43940064. Its totient is φ = 43940062.

The previous prime is 43940047. The next prime is 43940077. The reversal of 43940063 is 36004934.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43940063 - 2⁴ = 43940047 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43940003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21970031 + 21970032.

It is an arithmetic number, because the mean of its divisors is an integer number (21970032).

Almost surely, 2^43940063 is an apocalyptic number.

43940063 is a deficient number, since it is larger than the sum of its proper divisors (1).

43940063 is an equidigital number, since it uses as much as digits as its factorization.

43940063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 43940063 is about 6628.7301197137. The cubic root of 43940063 is about 352.8744588045.

Adding to 43940063 its reverse (36004934), we get a palindrome (79944997).

The spelling of 43940063 in words is "forty-three million, nine hundred forty thousand, sixty-three".