9977998517 has 8 divisors (see below), whose sum is σ = 10194900000. Its totient is φ = 9763096464.

The previous prime is 9977998453. The next prime is 9977998531. The reversal of 9977998517 is 7158997799.

9977998517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9977998517 - 2⁶ = 9977998453 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 (9977998577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489767 + ... + 509732.

It is an arithmetic number, because the mean of its divisors is an integer number (1274362500).

Almost surely, 2^9977998517 is an apocalyptic number.

It is an amenable number.

9977998517 is a deficient number, since it is larger than the sum of its proper divisors (216901483).

9977998517 is a wasteful number, since it uses less digits than its factorization.

9977998517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999715.

The product of its digits is 90016920, while the sum is 71.

The square root of 9977998517 is about 99889.9320101881. The cubic root of 9977998517 is about 2152.8535045766.

The spelling of 9977998517 in words is "nine billion, nine hundred seventy-seven million, nine hundred ninety-eight thousand, five hundred seventeen".