9947819376 has 60 divisors (see below), whose sum is σ = 30370998840. Its totient is φ = 3014490240.

The previous prime is 9947819359. The next prime is 9947819377. The reversal of 9947819376 is 6739187499.

9947819376 is a `hidden beast` number, since 9 + 9 + 478 + 1 + 93 + 76 = 666.

It is a super-2 number, since 2×9947819376² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9947819377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3138511 + ... + 3141678.

It is an arithmetic number, because the mean of its divisors is an integer number (506183314).

Almost surely, 2^9947819376 is an apocalyptic number.

It is an amenable number.

9947819376 is an abundant number, since it is smaller than the sum of its proper divisors (20423179464).

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

9947819376 is a wasteful number, since it uses less digits than its factorization.

9947819376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6280214 (or 6280205 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The square root of 9947819376 is about 99738.7556369138. The cubic root of 9947819376 is about 2150.6808282628.

The spelling of 9947819376 in words is "nine billion, nine hundred forty-seven million, eight hundred nineteen thousand, three hundred seventy-six".