7971954073 has 4 divisors (see below), whose sum is σ = 8001589860. Its totient is φ = 7942318288.

The previous prime is 7971954059. The next prime is 7971954091. The reversal of 7971954073 is 3704591797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180714249 + 7791239824 = 13443^2 + 88268^2 .

It is a cyclic number.

It is not a de Polignac number, because 7971954073 - 2²⁵ = 7938399641 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 7971954073.

It is not an unprimeable number, because it can be changed into a prime (7971952073) 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 3 ways as a sum of consecutive naturals, for example, 14817490 + ... + 14818027.

It is an arithmetic number, because the mean of its divisors is an integer number (2000397465).

Almost surely, 2^7971954073 is an apocalyptic number.

It is an amenable number.

7971954073 is a deficient number, since it is larger than the sum of its proper divisors (29635787).

7971954073 is a wasteful number, since it uses less digits than its factorization.

7971954073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29635786.

The product of its (nonzero) digits is 1666980, while the sum is 52.

The square root of 7971954073 is about 89285.7999516160. The cubic root of 7971954073 is about 1997.6601029251.

The spelling of 7971954073 in words is "seven billion, nine hundred seventy-one million, nine hundred fifty-four thousand, seventy-three".