7972083621 has 12 divisors (see below), whose sum is σ = 11629245420. Its totient is φ = 5262100800.

The previous prime is 7972083617. The next prime is 7972083643. The reversal of 7972083621 is 1263802797.

It can be written as a sum of positive squares in 2 ways, for example, as 3586332996 + 4385750625 = 59886^2 + 66225^2 .

It is not a de Polignac number, because 7972083621 - 2² = 7972083617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7972083601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4384176 + ... + 4385993.

It is an arithmetic number, because the mean of its divisors is an integer number (969103785).

Almost surely, 2^7972083621 is an apocalyptic number.

It is an amenable number.

7972083621 is a deficient number, since it is larger than the sum of its proper divisors (3657161799).

7972083621 is a wasteful number, since it uses less digits than its factorization.

7972083621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8770276 (or 8770273 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 7972083621 is about 89286.5254167727. The cubic root of 7972083621 is about 1997.6709238383.

The spelling of 7972083621 in words is "seven billion, nine hundred seventy-two million, eighty-three thousand, six hundred twenty-one".