128086229 has 2 divisors, whose sum is σ = 128086230. Its totient is φ = 128086228.

The previous prime is 128086223. The next prime is 128086237. The reversal of 128086229 is 922680821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70174129 + 57912100 = 8377^2 + 7610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128086229 is a prime.

It is equal to p_7275665 and since 128086229 and 7275665 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 128086192 and 128086201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128086223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64043114 + 64043115.

It is an arithmetic number, because the mean of its divisors is an integer number (64043115).

Almost surely, 2^128086229 is an apocalyptic number.

It is an amenable number.

128086229 is a deficient number, since it is larger than the sum of its proper divisors (1).

128086229 is an equidigital number, since it uses as much as digits as its factorization.

128086229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 128086229 is about 11317.5186768125. The cubic root of 128086229 is about 504.0815630260.

The spelling of 128086229 in words is "one hundred twenty-eight million, eighty-six thousand, two hundred twenty-nine".