43049641 has 2 divisors, whose sum is σ = 43049642. Its totient is φ = 43049640.

The previous prime is 43049639. The next prime is 43049651. The reversal of 43049641 is 14694034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35046400 + 8003241 = 5920^2 + 2829^2 .

It is a cyclic number.

It is not a de Polignac number, because 43049641 - 2¹ = 43049639 is a prime.

Together with 43049639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43049651) 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, 21524820 + 21524821.

It is an arithmetic number, because the mean of its divisors is an integer number (21524821).

Almost surely, 2^43049641 is an apocalyptic number.

It is an amenable number.

43049641 is a deficient number, since it is larger than the sum of its proper divisors (1).

43049641 is an equidigital number, since it uses as much as digits as its factorization.

43049641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 43049641 is about 6561.2225232802. Note that the first 3 decimals coincide. The cubic root of 43049641 is about 350.4745698388.

The spelling of 43049641 in words is "forty-three million, forty-nine thousand, six hundred forty-one".