9917707814987 has 8 divisors (see below), whose sum is σ = 11477998195200. Its totient is φ = 8393286179304.

The previous prime is 9917707814929. The next prime is 9917707815047. The reversal of 9917707814987 is 7894187077199.

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 9917707814987 - 2¹² = 9917707810891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9917707816987) 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, 8967185537 + ... + 8967186642.

It is an arithmetic number, because the mean of its divisors is an integer number (1434749774400).

Almost surely, 2^{9917707814987} is an apocalyptic number.

9917707814987 is a deficient number, since it is larger than the sum of its proper divisors (1560290380213).

9917707814987 is a wasteful number, since it uses less digits than its factorization.

9917707814987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17934372265.

The product of its (nonzero) digits is 448084224, while the sum is 77.

The spelling of 9917707814987 in words is "nine trillion, nine hundred seventeen billion, seven hundred seven million, eight hundred fourteen thousand, nine hundred eighty-seven".