43725066973 has 4 divisors (see below), whose sum is σ = 49971505120. Its totient is φ = 37478628828.

The previous prime is 43725066949. The next prime is 43725066977. The reversal of 43725066973 is 37966052734.

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-43725066973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43725066973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43725066977) 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, 3123219063 + ... + 3123219076.

It is an arithmetic number, because the mean of its divisors is an integer number (12492876280).

Almost surely, 2^43725066973 is an apocalyptic number.

It is an amenable number.

43725066973 is a deficient number, since it is larger than the sum of its proper divisors (6246438147).

43725066973 is an equidigital number, since it uses as much as digits as its factorization.

43725066973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6246438146.

The product of its (nonzero) digits is 5715360, while the sum is 52.

The spelling of 43725066973 in words is "forty-three billion, seven hundred twenty-five million, sixty-six thousand, nine hundred seventy-three".