128830873 has 2 divisors, whose sum is σ = 128830874. Its totient is φ = 128830872.

The previous prime is 128830861. The next prime is 128830927. The reversal of 128830873 is 378038821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97772544 + 31058329 = 9888^2 + 5573^2 .

It is an emirp because it is prime and its reverse (378038821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128830873 - 2²¹ = 126733721 is a prime.

It is not a weakly prime, because it can be changed into another prime (128830973) 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, 64415436 + 64415437.

It is an arithmetic number, because the mean of its divisors is an integer number (64415437).

Almost surely, 2^128830873 is an apocalyptic number.

It is an amenable number.

128830873 is a deficient number, since it is larger than the sum of its proper divisors (1).

128830873 is an equidigital number, since it uses as much as digits as its factorization.

128830873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 128830873 is about 11350.3688486322. The cubic root of 128830873 is about 505.0565214651.

The spelling of 128830873 in words is "one hundred twenty-eight million, eight hundred thirty thousand, eight hundred seventy-three".