43431943 has 2 divisors, whose sum is σ = 43431944. Its totient is φ = 43431942.

The previous prime is 43431931. The next prime is 43431953. The reversal of 43431943 is 34913434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43431943 - 2²¹ = 41334791 is a prime.

It is equal to p_2629084 and since 43431943 and 2629084 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43431953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21715971 + 21715972.

It is an arithmetic number, because the mean of its divisors is an integer number (21715972).

Almost surely, 2^43431943 is an apocalyptic number.

43431943 is a deficient number, since it is larger than the sum of its proper divisors (1).

43431943 is an equidigital number, since it uses as much as digits as its factorization.

43431943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 31.

The square root of 43431943 is about 6590.2915716985. The cubic root of 43431943 is about 351.5089760676.

The spelling of 43431943 in words is "forty-three million, four hundred thirty-one thousand, nine hundred forty-three".