128730229 has 2 divisors, whose sum is σ = 128730230. Its totient is φ = 128730228.

The previous prime is 128730221. The next prime is 128730233. The reversal of 128730229 is 922037821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128482225 + 248004 = 11335^2 + 498^2 .

It is an emirp because it is prime and its reverse (922037821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128730229 - 2³ = 128730221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128730194 and 128730203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128730221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64365114 + 64365115.

It is an arithmetic number, because the mean of its divisors is an integer number (64365115).

Almost surely, 2^128730229 is an apocalyptic number.

It is an amenable number.

128730229 is a deficient number, since it is larger than the sum of its proper divisors (1).

128730229 is an equidigital number, since it uses as much as digits as its factorization.

128730229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 128730229 is about 11345.9344701087. The cubic root of 128730229 is about 504.9249687566.

The spelling of 128730229 in words is "one hundred twenty-eight million, seven hundred thirty thousand, two hundred twenty-nine".