7988386961 has 8 divisors (see below), whose sum is σ = 8411546880. Its totient is φ = 7565498928.

The previous prime is 7988386957. The next prime is 7988387039. The reversal of 7988386961 is 1696838897.

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 7988386961 - 2² = 7988386957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7988386561) 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, 6206 + ... + 126551.

It is an arithmetic number, because the mean of its divisors is an integer number (1051443360).

Almost surely, 2^7988386961 is an apocalyptic number.

It is an amenable number.

7988386961 is a deficient number, since it is larger than the sum of its proper divisors (423159919).

7988386961 is a wasteful number, since it uses less digits than its factorization.

7988386961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135943.

The product of its digits is 31352832, while the sum is 65.

The square root of 7988386961 is about 89377.7766617631. The cubic root of 7988386961 is about 1999.0317780988.

The spelling of 7988386961 in words is "seven billion, nine hundred eighty-eight million, three hundred eighty-six thousand, nine hundred sixty-one".