7917923911973 has 16 divisors (see below), whose sum is σ = 7944438744000. Its totient is φ = 7891467316992.

The previous prime is 7917923911951. The next prime is 7917923911981. The reversal of 7917923911973 is 3791193297197.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7917923911973 - 2²⁰ = 7917922863397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7917923911913) 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 15 ways as a sum of consecutive naturals, for example, 939362723 + ... + 939371151.

It is an arithmetic number, because the mean of its divisors is an integer number (496527421500).

Almost surely, 2^{7917923911973} is an apocalyptic number.

It is an amenable number.

7917923911973 is a deficient number, since it is larger than the sum of its proper divisors (26514832027).

7917923911973 is a wasteful number, since it uses less digits than its factorization.

7917923911973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11524.

The product of its digits is 40507614, while the sum is 68.

The spelling of 7917923911973 in words is "seven trillion, nine hundred seventeen billion, nine hundred twenty-three million, nine hundred eleven thousand, nine hundred seventy-three".