9847977123 has 4 divisors (see below), whose sum is σ = 13130636168. Its totient is φ = 6565318080.

The previous prime is 9847977121. The next prime is 9847977131. The reversal of 9847977123 is 3217797489.

9847977123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9847977123 - 2¹ = 9847977121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9847977121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641329518 + ... + 1641329523.

It is an arithmetic number, because the mean of its divisors is an integer number (3282659042).

Almost surely, 2^9847977123 is an apocalyptic number.

9847977123 is a deficient number, since it is larger than the sum of its proper divisors (3282659045).

9847977123 is a wasteful number, since it uses less digits than its factorization.

9847977123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282659044.

The product of its digits is 5334336, while the sum is 57.

The square root of 9847977123 is about 99236.9745760117. The cubic root of 9847977123 is about 2143.4614492863.

The spelling of 9847977123 in words is "nine billion, eight hundred forty-seven million, nine hundred seventy-seven thousand, one hundred twenty-three".