43999010939 has 16 divisors (see below), whose sum is σ = 47711008800. Its totient is φ = 40334324736.

The previous prime is 43999010927. The next prime is 43999010941. The reversal of 43999010939 is 93901099934.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43999010939 is a prime.

It is a super-2 number, since 2×43999010939² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43999010339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2078792 + ... + 2099850.

It is an arithmetic number, because the mean of its divisors is an integer number (2981938050).

Almost surely, 2^43999010939 is an apocalyptic number.

43999010939 is a deficient number, since it is larger than the sum of its proper divisors (3711997861).

43999010939 is a wasteful number, since it uses less digits than its factorization.

43999010939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22174.

The product of its (nonzero) digits is 2125764, while the sum is 56.

The spelling of 43999010939 in words is "forty-three billion, nine hundred ninety-nine million, ten thousand, nine hundred thirty-nine".