43538305709 has 4 divisors (see below), whose sum is σ = 43541282400. Its totient is φ = 43535329020.

The previous prime is 43538305703. The next prime is 43538305729. The reversal of 43538305709 is 90750383534.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43538305709 - 2⁸ = 43538305453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43538305703) 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 3 ways as a sum of consecutive naturals, for example, 1466297 + ... + 1495694.

It is an arithmetic number, because the mean of its divisors is an integer number (10885320600).

Almost surely, 2^43538305709 is an apocalyptic number.

It is an amenable number.

43538305709 is a deficient number, since it is larger than the sum of its proper divisors (2976691).

43538305709 is a wasteful number, since it uses less digits than its factorization.

43538305709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976690.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 43538305709 in words is "forty-three billion, five hundred thirty-eight million, three hundred five thousand, seven hundred nine".