9878127247 has 4 divisors (see below), whose sum is σ = 9883477296. Its totient is φ = 9872777200.

The previous prime is 9878127221. The next prime is 9878127251. The reversal of 9878127247 is 7427218789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7427218789 = 2063 ⋅3600203.

It is a cyclic number.

It is not a de Polignac number, because 9878127247 - 2²³ = 9869738639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878197247) 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, 2672254 + ... + 2675947.

It is an arithmetic number, because the mean of its divisors is an integer number (2470869324).

Almost surely, 2^9878127247 is an apocalyptic number.

9878127247 is a deficient number, since it is larger than the sum of its proper divisors (5350049).

9878127247 is a wasteful number, since it uses less digits than its factorization.

9878127247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5350048.

The product of its digits is 3161088, while the sum is 55.

The square root of 9878127247 is about 99388.7682135160. The cubic root of 9878127247 is about 2145.6466624857.

The spelling of 9878127247 in words is "nine billion, eight hundred seventy-eight million, one hundred twenty-seven thousand, two hundred forty-seven".