8864221139 has 2 divisors, whose sum is σ = 8864221140. Its totient is φ = 8864221138.

The previous prime is 8864221123. The next prime is 8864221193. The reversal of 8864221139 is 9311224688.

It is a happy number.

Together with next prime (8864221193) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8864221139 - 2⁴ = 8864221123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8864221139.

It is not a weakly prime, because it can be changed into another prime (8864221109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4432110569 + 4432110570.

It is an arithmetic number, because the mean of its divisors is an integer number (4432110570).

Almost surely, 2^8864221139 is an apocalyptic number.

8864221139 is a deficient number, since it is larger than the sum of its proper divisors (1).

8864221139 is an equidigital number, since it uses as much as digits as its factorization.

8864221139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 44.

The square root of 8864221139 is about 94149.9927721718. The cubic root of 8864221139 is about 2069.5703511342.

The spelling of 8864221139 in words is "eight billion, eight hundred sixty-four million, two hundred twenty-one thousand, one hundred thirty-nine".