9897447827 has 4 divisors (see below), whose sum is σ = 10065201240. Its totient is φ = 9729694416.

The previous prime is 9897447811. The next prime is 9897447863. The reversal of 9897447827 is 7287447989.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9897447827 - 2⁴ = 9897447811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9897447877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83876618 + ... + 83876735.

It is an arithmetic number, because the mean of its divisors is an integer number (2516300310).

Almost surely, 2^9897447827 is an apocalyptic number.

9897447827 is a deficient number, since it is larger than the sum of its proper divisors (167753413).

9897447827 is a wasteful number, since it uses less digits than its factorization.

9897447827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167753412.

The product of its digits is 56899584, while the sum is 65.

The square root of 9897447827 is about 99485.9177321092. The cubic root of 9897447827 is about 2147.0446379990.

The spelling of 9897447827 in words is "nine billion, eight hundred ninety-seven million, four hundred forty-seven thousand, eight hundred twenty-seven".