43421047 has 2 divisors, whose sum is σ = 43421048. Its totient is φ = 43421046.

The previous prime is 43421039. The next prime is 43421069. The reversal of 43421047 is 74012434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43421047 - 2³ = 43421039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43421087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21710523 + 21710524.

It is an arithmetic number, because the mean of its divisors is an integer number (21710524).

Almost surely, 2^43421047 is an apocalyptic number.

43421047 is a deficient number, since it is larger than the sum of its proper divisors (1).

43421047 is an equidigital number, since it uses as much as digits as its factorization.

43421047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 43421047 is about 6589.4648492878. The cubic root of 43421047 is about 351.4795786405.

The spelling of 43421047 in words is "forty-three million, four hundred twenty-one thousand, forty-seven".