43487243 has 2 divisors, whose sum is σ = 43487244. Its totient is φ = 43487242.

The previous prime is 43487237. The next prime is 43487291. The reversal of 43487243 is 34278434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43487243 - 2⁸ = 43486987 is a prime.

It is a super-2 number, since 2×43487243² = 3782280607482098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43483243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21743621 + 21743622.

It is an arithmetic number, because the mean of its divisors is an integer number (21743622).

Almost surely, 2^43487243 is an apocalyptic number.

43487243 is a deficient number, since it is larger than the sum of its proper divisors (1).

43487243 is an equidigital number, since it uses as much as digits as its factorization.

43487243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 35.

The square root of 43487243 is about 6594.4858025475. The cubic root of 43487243 is about 351.6580998140.

The spelling of 43487243 in words is "forty-three million, four hundred eighty-seven thousand, two hundred forty-three".