43666487 has 2 divisors, whose sum is σ = 43666488. Its totient is φ = 43666486.

The previous prime is 43666471. The next prime is 43666561. The reversal of 43666487 is 78466634.

It is a happy number.

43666487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43666487 - 2⁴ = 43666471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43666087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21833243 + 21833244.

It is an arithmetic number, because the mean of its divisors is an integer number (21833244).

Almost surely, 2^43666487 is an apocalyptic number.

43666487 is a deficient number, since it is larger than the sum of its proper divisors (1).

43666487 is an equidigital number, since it uses as much as digits as its factorization.

43666487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 44.

The square root of 43666487 is about 6608.0622727090. The cubic root of 43666487 is about 352.1405876740.

The spelling of 43666487 in words is "forty-three million, six hundred sixty-six thousand, four hundred eighty-seven".