7972039841 has 2 divisors, whose sum is σ = 7972039842. Its totient is φ = 7972039840.

The previous prime is 7972039799. The next prime is 7972039847. The reversal of 7972039841 is 1489302797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7725706816 + 246333025 = 87896^2 + 15695^2 .

It is an emirp because it is prime and its reverse (1489302797) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7972039841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7972039841.

It is not a weakly prime, because it can be changed into another prime (7972039847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3986019920 + 3986019921.

It is an arithmetic number, because the mean of its divisors is an integer number (3986019921).

Almost surely, 2^7972039841 is an apocalyptic number.

It is an amenable number.

7972039841 is a deficient number, since it is larger than the sum of its proper divisors (1).

7972039841 is an equidigital number, since it uses as much as digits as its factorization.

7972039841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 7972039841 is about 89286.2802506634. The cubic root of 7972039841 is about 1997.6672669862.

The spelling of 7972039841 in words is "seven billion, nine hundred seventy-two million, thirty-nine thousand, eight hundred forty-one".