128700029 has 2 divisors, whose sum is σ = 128700030. Its totient is φ = 128700028.

The previous prime is 128700007. The next prime is 128700037. The reversal of 128700029 is 920007821.

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., 84676804 + 44023225 = 9202^2 + 6635^2 .

It is an emirp because it is prime and its reverse (920007821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128700029 - 2⁸ = 128699773 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 128699974 and 128700010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128700329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64350014 + 64350015.

It is an arithmetic number, because the mean of its divisors is an integer number (64350015).

Almost surely, 2^128700029 is an apocalyptic number.

It is an amenable number.

128700029 is a deficient number, since it is larger than the sum of its proper divisors (1).

128700029 is an equidigital number, since it uses as much as digits as its factorization.

128700029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 128700029 is about 11344.6035188542. The cubic root of 128700029 is about 504.8854806820.

The spelling of 128700029 in words is "one hundred twenty-eight million, seven hundred thousand, twenty-nine".