88600000721 has 2 divisors, whose sum is σ = 88600000722. Its totient is φ = 88600000720.

The previous prime is 88600000669. The next prime is 88600000913. The reversal of 88600000721 is 12700000688.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81967690000 + 6632310721 = 286300^2 + 81439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88600000721 is a prime.

It is a super-2 number, since 2×88600000721² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (88600020721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44300000360 + 44300000361.

It is an arithmetic number, because the mean of its divisors is an integer number (44300000361).

Almost surely, 2^88600000721 is an apocalyptic number.

It is an amenable number.

88600000721 is a deficient number, since it is larger than the sum of its proper divisors (1).

88600000721 is an equidigital number, since it uses as much as digits as its factorization.

88600000721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 32.

The spelling of 88600000721 in words is "eighty-eight billion, six hundred million, seven hundred twenty-one", and thus it is an aban number.