9861880247 has 2 divisors, whose sum is σ = 9861880248. Its totient is φ = 9861880246.

The previous prime is 9861880241. The next prime is 9861880253. The reversal of 9861880247 is 7420881689.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (9861880241) and next prime (9861880253).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9861880247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9861880241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4930940123 + 4930940124.

It is an arithmetic number, because the mean of its divisors is an integer number (4930940124).

Almost surely, 2^9861880247 is an apocalyptic number.

9861880247 is a deficient number, since it is larger than the sum of its proper divisors (1).

9861880247 is an equidigital number, since it uses as much as digits as its factorization.

9861880247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1548288, while the sum is 53.

The square root of 9861880247 is about 99306.9999899302. Note that the first 4 decimals coincide. The cubic root of 9861880247 is about 2144.4696697877.

The spelling of 9861880247 in words is "nine billion, eight hundred sixty-one million, eight hundred eighty thousand, two hundred forty-seven".