43873366399 has 4 divisors (see below), whose sum is σ = 44103070080. Its totient is φ = 43643662720.

The previous prime is 43873366349. The next prime is 43873366409. The reversal of 43873366399 is 99366337834.

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 43873366399 - 2¹⁷ = 43873235327 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 (43873366349) 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, 114851554 + ... + 114851935.

It is an arithmetic number, because the mean of its divisors is an integer number (11025767520).

Almost surely, 2^43873366399 is an apocalyptic number.

43873366399 is a deficient number, since it is larger than the sum of its proper divisors (229703681).

43873366399 is a wasteful number, since it uses less digits than its factorization.

43873366399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229703680.

The product of its digits is 52907904, while the sum is 61.

The spelling of 43873366399 in words is "forty-three billion, eight hundred seventy-three million, three hundred sixty-six thousand, three hundred ninety-nine".