43091938509 has 8 divisors (see below), whose sum is σ = 57841528800. Its totient is φ = 28535153616.

The previous prime is 43091938499. The next prime is 43091938541. The reversal of 43091938509 is 90583919034.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43091938509 - 2⁴ = 43091938493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43091938009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48200827 + ... + 48201720.

It is an arithmetic number, because the mean of its divisors is an integer number (7230191100).

Almost surely, 2^43091938509 is an apocalyptic number.

It is an amenable number.

43091938509 is a deficient number, since it is larger than the sum of its proper divisors (14749590291).

43091938509 is a wasteful number, since it uses less digits than its factorization.

43091938509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96402699.

The product of its (nonzero) digits is 1049760, while the sum is 51.

The spelling of 43091938509 in words is "forty-three billion, ninety-one million, nine hundred thirty-eight thousand, five hundred nine".