8000439973 has 2 divisors, whose sum is σ = 8000439974. Its totient is φ = 8000439972.

The previous prime is 8000439961. The next prime is 8000440031. The reversal of 8000439973 is 3799340008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5705838369 + 2294601604 = 75537^2 + 47902^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8000439973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8000439673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4000219986 + 4000219987.

It is an arithmetic number, because the mean of its divisors is an integer number (4000219987).

Almost surely, 2^8000439973 is an apocalyptic number.

It is an amenable number.

8000439973 is a deficient number, since it is larger than the sum of its proper divisors (1).

8000439973 is an equidigital number, since it uses as much as digits as its factorization.

8000439973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 8000439973 is about 89445.1785900168. The cubic root of 8000439973 is about 2000.0366637445.

The spelling of 8000439973 in words is "eight billion, four hundred thirty-nine thousand, nine hundred seventy-three".