43124001209 has 4 divisors (see below), whose sum is σ = 43550971620. Its totient is φ = 42697030800.

The previous prime is 43124001197. The next prime is 43124001233. The reversal of 43124001209 is 90210042134.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29568522025 + 13555479184 = 171955^2 + 116428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43124001209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43124001259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213485054 + ... + 213485255.

It is an arithmetic number, because the mean of its divisors is an integer number (10887742905).

Almost surely, 2^43124001209 is an apocalyptic number.

It is an amenable number.

43124001209 is a deficient number, since it is larger than the sum of its proper divisors (426970411).

43124001209 is a wasteful number, since it uses less digits than its factorization.

43124001209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426970410.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 43124001209 in words is "forty-three billion, one hundred twenty-four million, one thousand, two hundred nine".