43006009 has 2 divisors, whose sum is σ = 43006010. Its totient is φ = 43006008.

The previous prime is 43005983. The next prime is 43006087. The reversal of 43006009 is 90060034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23619600 + 19386409 = 4860^2 + 4403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43006009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43006309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21503004 + 21503005.

It is an arithmetic number, because the mean of its divisors is an integer number (21503005).

Almost surely, 2^43006009 is an apocalyptic number.

It is an amenable number.

43006009 is a deficient number, since it is larger than the sum of its proper divisors (1).

43006009 is an equidigital number, since it uses as much as digits as its factorization.

43006009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 43006009 is about 6557.8966902506. The cubic root of 43006009 is about 350.3561245956.

The spelling of 43006009 in words is "forty-three million, six thousand, nine".