43421393 has 2 divisors, whose sum is σ = 43421394. Its totient is φ = 43421392.

The previous prime is 43421369. The next prime is 43421429. The reversal of 43421393 is 39312434.

43421393 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 can be written as a sum of positive squares in only one way, i.e., 29343889 + 14077504 = 5417^2 + 3752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43421393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43420393) 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, 21710696 + 21710697.

It is an arithmetic number, because the mean of its divisors is an integer number (21710697).

Almost surely, 2^43421393 is an apocalyptic number.

It is an amenable number.

43421393 is a deficient number, since it is larger than the sum of its proper divisors (1).

43421393 is an equidigital number, since it uses as much as digits as its factorization.

43421393 is an odious number, because the sum of its binary digits is odd.

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

The square root of 43421393 is about 6589.4911032643. The cubic root of 43421393 is about 351.4805122247.

It can be divided in two parts, 4342 and 1393, that multiplied together give a palindrome (6048406).

The spelling of 43421393 in words is "forty-three million, four hundred twenty-one thousand, three hundred ninety-three".