43041001009 has 2 divisors, whose sum is σ = 43041001010. Its totient is φ = 43041001008.

The previous prime is 43041000943. The next prime is 43041001043. The reversal of 43041001009 is 90010014034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40661512609 + 2379488400 = 201647^2 + 48780^2 .

It is a cyclic number.

It is not a de Polignac number, because 43041001009 - 2¹³ = 43040992817 is a prime.

It is not a weakly prime, because it can be changed into another prime (43041001099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21520500504 + 21520500505.

It is an arithmetic number, because the mean of its divisors is an integer number (21520500505).

Almost surely, 2^43041001009 is an apocalyptic number.

It is an amenable number.

43041001009 is a deficient number, since it is larger than the sum of its proper divisors (1).

43041001009 is an equidigital number, since it uses as much as digits as its factorization.

43041001009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 43041001009 in words is "forty-three billion, forty-one million, one thousand, nine".