43424393 has 2 divisors, whose sum is σ = 43424394. Its totient is φ = 43424392.

The previous prime is 43424389. The next prime is 43424417. The reversal of 43424393 is 39342434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40284409 + 3139984 = 6347^2 + 1772^2 .

It is a cyclic number.

It is not a de Polignac number, because 43424393 - 2² = 43424389 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43424323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21712196 + 21712197.

It is an arithmetic number, because the mean of its divisors is an integer number (21712197).

Almost surely, 2^43424393 is an apocalyptic number.

It is an amenable number.

43424393 is a deficient number, since it is larger than the sum of its proper divisors (1).

43424393 is an equidigital number, since it uses as much as digits as its factorization.

43424393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 32.

The square root of 43424393 is about 6589.7187345136. The cubic root of 43424393 is about 351.4886066775.

The spelling of 43424393 in words is "forty-three million, four hundred twenty-four thousand, three hundred ninety-three".