8861398061 has 2 divisors, whose sum is σ = 8861398062. Its totient is φ = 8861398060.

The previous prime is 8861398003. The next prime is 8861398067. The reversal of 8861398061 is 1608931688.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7078025161 + 1783372900 = 84131^2 + 42230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8861398061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8861398067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4430699030 + 4430699031.

It is an arithmetic number, because the mean of its divisors is an integer number (4430699031).

Almost surely, 2^8861398061 is an apocalyptic number.

It is an amenable number.

8861398061 is a deficient number, since it is larger than the sum of its proper divisors (1).

8861398061 is an equidigital number, since it uses as much as digits as its factorization.

8861398061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 8861398061 is about 94134.9991289106. Note that the first 3 decimals coincide. The cubic root of 8861398061 is about 2069.3506221514.

The spelling of 8861398061 in words is "eight billion, eight hundred sixty-one million, three hundred ninety-eight thousand, sixty-one".