8861398261 has 2 divisors, whose sum is σ = 8861398262. Its totient is φ = 8861398260.

The previous prime is 8861398199. The next prime is 8861398289. The reversal of 8861398261 is 1628931688.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8861398225 + 36 = 94135^2 + 6^2 .

It is a cyclic number.

It is not a de Polignac number, because 8861398261 - 2¹¹ = 8861396213 is a prime.

It is a super-3 number, since 3×8861398261³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8861398199 and 8861398208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8861398061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4430699130 + 4430699131.

It is an arithmetic number, because the mean of its divisors is an integer number (4430699131).

Almost surely, 2^8861398261 is an apocalyptic number.

It is an amenable number.

8861398261 is a deficient number, since it is larger than the sum of its proper divisors (1).

8861398261 is an equidigital number, since it uses as much as digits as its factorization.

8861398261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 52.

The square root of 8861398261 is about 94135.0001912147. Note that the first 3 decimals coincide. The cubic root of 8861398261 is about 2069.3506377196.

The spelling of 8861398261 in words is "eight billion, eight hundred sixty-one million, three hundred ninety-eight thousand, two hundred sixty-one".