43320413 has 2 divisors, whose sum is σ = 43320414. Its totient is φ = 43320412.

The previous prime is 43320397. The next prime is 43320419. The reversal of 43320413 is 31402334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42549529 + 770884 = 6523^2 + 878^2 .

It is a cyclic number.

It is not a de Polignac number, because 43320413 - 2⁴ = 43320397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43320419) 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 as a sum of consecutive naturals, namely, 21660206 + 21660207.

It is an arithmetic number, because the mean of its divisors is an integer number (21660207).

Almost surely, 2^43320413 is an apocalyptic number.

It is an amenable number.

43320413 is a deficient number, since it is larger than the sum of its proper divisors (1).

43320413 is an equidigital number, since it uses as much as digits as its factorization.

43320413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 43320413 is about 6581.8244431161. The cubic root of 43320413 is about 351.2078351805.

Adding to 43320413 its reverse (31402334), we get a palindrome (74722747).

The spelling of 43320413 in words is "forty-three million, three hundred twenty thousand, four hundred thirteen".