43947380737 has 24 divisors (see below), whose sum is σ = 48007348920. Its totient is φ = 40210260480.

The previous prime is 43947380717. The next prime is 43947380783. The reversal of 43947380737 is 73708374934.

It can be written as a sum of positive squares in 12 ways, for example, as 6183620496 + 37763760241 = 78636^2 + 194329^2 .

It is a de Polignac number, because none of the positive numbers 2^k-43947380737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43947380717) 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 23 ways as a sum of consecutive naturals, for example, 24564439 + ... + 24566227.

It is an arithmetic number, because the mean of its divisors is an integer number (2000306205).

Almost surely, 2^43947380737 is an apocalyptic number.

It is an amenable number.

43947380737 is a deficient number, since it is larger than the sum of its proper divisors (4059968183).

43947380737 is a wasteful number, since it uses less digits than its factorization.

43947380737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013 (or 3000 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 55.

The spelling of 43947380737 in words is "forty-three billion, nine hundred forty-seven million, three hundred eighty thousand, seven hundred thirty-seven".