9947547009 has 8 divisors (see below), whose sum is σ = 14737106720. Its totient is φ = 6631697988.

The previous prime is 9947546971. The next prime is 9947547041. The reversal of 9947547009 is 9007457499.

9947547009 is a `hidden beast` number, since 9 + 94 + 7 + 547 + 0 + 0 + 9 = 666.

It is not a de Polignac number, because 9947547009 - 2¹¹ = 9947544961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9947542009) 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, 184213807 + ... + 184213860.

It is an arithmetic number, because the mean of its divisors is an integer number (1842138340).

Almost surely, 2^9947547009 is an apocalyptic number.

It is an amenable number.

9947547009 is a deficient number, since it is larger than the sum of its proper divisors (4789559711).

9947547009 is a wasteful number, since it uses less digits than its factorization.

9947547009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368427676 (or 368427670 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 9947547009 is about 99737.3902255318. The cubic root of 9947547009 is about 2150.6611998461.

The spelling of 9947547009 in words is "nine billion, nine hundred forty-seven million, five hundred forty-seven thousand, nine".