43668042973 has 2 divisors, whose sum is σ = 43668042974. Its totient is φ = 43668042972.

The previous prime is 43668042911. The next prime is 43668042983. The reversal of 43668042973 is 37924086634.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22364305209 + 21303737764 = 149547^2 + 145958^2 .

It is a cyclic number.

It is not a de Polignac number, because 43668042973 - 2²¹ = 43665945821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43668042973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43668042983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21834021486 + 21834021487.

It is an arithmetic number, because the mean of its divisors is an integer number (21834021487).

Almost surely, 2^43668042973 is an apocalyptic number.

It is an amenable number.

43668042973 is a deficient number, since it is larger than the sum of its proper divisors (1).

43668042973 is an equidigital number, since it uses as much as digits as its factorization.

43668042973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 52.

The spelling of 43668042973 in words is "forty-three billion, six hundred sixty-eight million, forty-two thousand, nine hundred seventy-three".