43424639 has 2 divisors, whose sum is σ = 43424640. Its totient is φ = 43424638.

The previous prime is 43424611. The next prime is 43424653. The reversal of 43424639 is 93642434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43424639 - 2⁸ = 43424383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43424599 and 43424608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43424609) 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, 21712319 + 21712320.

It is an arithmetic number, because the mean of its divisors is an integer number (21712320).

Almost surely, 2^43424639 is an apocalyptic number.

43424639 is a deficient number, since it is larger than the sum of its proper divisors (1).

43424639 is an equidigital number, since it uses as much as digits as its factorization.

43424639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 35.

The square root of 43424639 is about 6589.7373999273. The cubic root of 43424639 is about 351.4892704061.

The spelling of 43424639 in words is "forty-three million, four hundred twenty-four thousand, six hundred thirty-nine".