43490143 has 2 divisors, whose sum is σ = 43490144. Its totient is φ = 43490142.

The previous prime is 43490141. The next prime is 43490147. The reversal of 43490143 is 34109434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43490143 - 2¹ = 43490141 is a prime.

Together with 43490141, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43490141) 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, 21745071 + 21745072.

It is an arithmetic number, because the mean of its divisors is an integer number (21745072).

Almost surely, 2^43490143 is an apocalyptic number.

43490143 is a deficient number, since it is larger than the sum of its proper divisors (1).

43490143 is an equidigital number, since it uses as much as digits as its factorization.

43490143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 43490143 is about 6594.7056795584. The cubic root of 43490143 is about 351.6659165571.

Adding to 43490143 its reverse (34109434), we get a palindrome (77599577).

The spelling of 43490143 in words is "forty-three million, four hundred ninety thousand, one hundred forty-three".