128913 has 8 divisors (see below), whose sum is σ = 174048. Its totient is φ = 84864.

The previous prime is 128903. The next prime is 128923. The reversal of 128913 is 319821.

It is an interprime number because it is at equal distance from previous prime (128903) and next prime (128923).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128913 - 2⁸ = 128657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70 + ... + 512.

It is an arithmetic number, because the mean of its divisors is an integer number (21756).

2¹²⁸⁹¹³ is an apocalyptic number.

It is an amenable number.

128913 is a deficient number, since it is larger than the sum of its proper divisors (45135).

128913 is an equidigital number, since it uses as much as digits as its factorization.

128913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543.

The product of its digits is 432, while the sum is 24.

The square root of 128913 is about 359.0445654790. The cubic root of 128913 is about 50.5163819675.

The spelling of 128913 in words is "one hundred twenty-eight thousand, nine hundred thirteen".