7976973145 has 4 divisors (see below), whose sum is σ = 9572367780. Its totient is φ = 6381578512.

The previous prime is 7976973077. The next prime is 7976973181. The reversal of 7976973145 is 5413796797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5413796797 = 6043 ⋅895879.

It can be written as a sum of positive squares in 2 ways, for example, as 1465128729 + 6511844416 = 38277^2 + 80696^2 .

It is a cyclic number.

It is not a de Polignac number, because 7976973145 - 2¹¹ = 7976971097 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 7976973145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797697310 + ... + 797697319.

It is an arithmetic number, because the mean of its divisors is an integer number (2393091945).

Almost surely, 2^7976973145 is an apocalyptic number.

It is an amenable number.

7976973145 is a deficient number, since it is larger than the sum of its proper divisors (1595394635).

7976973145 is a wasteful number, since it uses less digits than its factorization.

7976973145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595394634.

The product of its digits is 10001880, while the sum is 58.

The square root of 7976973145 is about 89313.9023052962. The cubic root of 7976973145 is about 1998.0792513695.

The spelling of 7976973145 in words is "seven billion, nine hundred seventy-six million, nine hundred seventy-three thousand, one hundred forty-five".