7971613607 has 4 divisors (see below), whose sum is σ = 7971793440. Its totient is φ = 7971433776.

The previous prime is 7971613603. The next prime is 7971613669. The reversal of 7971613607 is 7063161797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7063161797 = 97 ⋅72816101.

It is a cyclic number.

It is not a de Polignac number, because 7971613607 - 2² = 7971613603 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 (7971613603) 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, 28994 + ... + 129552.

It is an arithmetic number, because the mean of its divisors is an integer number (1992948360).

Almost surely, 2^7971613607 is an apocalyptic number.

7971613607 is a deficient number, since it is larger than the sum of its proper divisors (179833).

7971613607 is a wasteful number, since it uses less digits than its factorization.

7971613607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179832.

The product of its (nonzero) digits is 333396, while the sum is 47.

The square root of 7971613607 is about 89283.8933234881. The cubic root of 7971613607 is about 1997.6316638489.

The spelling of 7971613607 in words is "seven billion, nine hundred seventy-one million, six hundred thirteen thousand, six hundred seven".