43091321719 has 4 divisors (see below), whose sum is σ = 45359286040. Its totient is φ = 40823357400.

The previous prime is 43091321717. The next prime is 43091321753. The reversal of 43091321719 is 91712319034.

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

It is a cyclic number.

It is not a de Polignac number, because 43091321719 - 2¹ = 43091321717 is a prime.

It is a super-2 number, since 2×43091321719² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43091321717) 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, 1133982132 + ... + 1133982169.

It is an arithmetic number, because the mean of its divisors is an integer number (11339821510).

Almost surely, 2^43091321719 is an apocalyptic number.

43091321719 is a deficient number, since it is larger than the sum of its proper divisors (2267964321).

43091321719 is a wasteful number, since it uses less digits than its factorization.

43091321719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267964320.

The product of its (nonzero) digits is 40824, while the sum is 40.

The spelling of 43091321719 in words is "forty-three billion, ninety-one million, three hundred twenty-one thousand, seven hundred nineteen".