43322009 has 2 divisors, whose sum is σ = 43322010. Its totient is φ = 43322008.

The previous prime is 43321997. The next prime is 43322011. The reversal of 43322009 is 90022334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43099225 + 222784 = 6565^2 + 472^2 .

It is a cyclic number.

It is not a de Polignac number, because 43322009 - 2¹² = 43317913 is a prime.

Together with 43322011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43322029) 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, 21661004 + 21661005.

It is an arithmetic number, because the mean of its divisors is an integer number (21661005).

Almost surely, 2^43322009 is an apocalyptic number.

It is an amenable number.

43322009 is a deficient number, since it is larger than the sum of its proper divisors (1).

43322009 is an equidigital number, since it uses as much as digits as its factorization.

43322009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 43322009 is about 6581.9456849780. The cubic root of 43322009 is about 351.2121481650.

The spelling of 43322009 in words is "forty-three million, three hundred twenty-two thousand, nine".