9917651214 has 12 divisors (see below), whose sum is σ = 21488244336. Its totient is φ = 3305883732.

The previous prime is 9917651189. The next prime is 9917651239. The reversal of 9917651214 is 4121567199.

It is an interprime number because it is at equal distance from previous prime (9917651189) and next prime (9917651239).

It is a self number, because there is not a number n which added to its sum of digits gives 9917651214.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 275490294 + ... + 275490329.

It is an arithmetic number, because the mean of its divisors is an integer number (1790687028).

Almost surely, 2^9917651214 is an apocalyptic number.

9917651214 is an abundant number, since it is smaller than the sum of its proper divisors (11570593122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9917651214 is a wasteful number, since it uses less digits than its factorization.

9917651214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550980631 (or 550980628 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 9917651214 is about 99587.4048964024. The cubic root of 9917651214 is about 2148.5045460737.

The spelling of 9917651214 in words is "nine billion, nine hundred seventeen million, six hundred fifty-one thousand, two hundred fourteen".