43985743873 has 4 divisors (see below), whose sum is σ = 43986538240. Its totient is φ = 43984949508.

The previous prime is 43985743859. The next prime is 43985743979. The reversal of 43985743873 is 37834758934.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-43985743873 is a prime.

It is a super-2 number, since 2×43985743873² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43985743073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307353 + ... + 427126.

It is an arithmetic number, because the mean of its divisors is an integer number (10996634560).

Almost surely, 2^43985743873 is an apocalyptic number.

It is an amenable number.

43985743873 is a deficient number, since it is larger than the sum of its proper divisors (794367).

43985743873 is an equidigital number, since it uses as much as digits as its factorization.

43985743873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794366.

The product of its digits is 60963840, while the sum is 61.

The spelling of 43985743873 in words is "forty-three billion, nine hundred eighty-five million, seven hundred forty-three thousand, eight hundred seventy-three".