7971613609 has 8 divisors (see below), whose sum is σ = 8586316640. Its totient is φ = 7376425056.

The previous prime is 7971613603. The next prime is 7971613669. The reversal of 7971613609 is 9063161797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7971613609 - 2⁵ = 7971613577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7971613603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4877772 + ... + 4879405.

It is an arithmetic number, because the mean of its divisors is an integer number (1073289580).

Almost surely, 2^7971613609 is an apocalyptic number.

It is an amenable number.

7971613609 is a deficient number, since it is larger than the sum of its proper divisors (614703031).

7971613609 is a wasteful number, since it uses less digits than its factorization.

7971613609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9757239.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 7971613609 is about 89283.8933346883. The cubic root of 7971613609 is about 1997.6316640160.

The spelling of 7971613609 in words is "seven billion, nine hundred seventy-one million, six hundred thirteen thousand, six hundred nine".