43673009 has 2 divisors, whose sum is σ = 43673010. Its totient is φ = 43673008.

The previous prime is 43672999. The next prime is 43673033. The reversal of 43673009 is 90037634.

43673009 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 can be written as a sum of positive squares in only one way, i.e., 40360609 + 3312400 = 6353^2 + 1820^2 .

It is a cyclic number.

It is not a de Polignac number, because 43673009 - 2¹² = 43668913 is a prime.

It is a super-2 number, since 2×43673009² = 3814663430228162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43673059) 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, 21836504 + 21836505.

It is an arithmetic number, because the mean of its divisors is an integer number (21836505).

Almost surely, 2^43673009 is an apocalyptic number.

It is an amenable number.

43673009 is a deficient number, since it is larger than the sum of its proper divisors (1).

43673009 is an equidigital number, since it uses as much as digits as its factorization.

43673009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 43673009 is about 6608.5557423691. Note that the first 3 decimals coincide. The cubic root of 43673009 is about 352.1581186361.

The spelling of 43673009 in words is "forty-three million, six hundred seventy-three thousand, nine".