128873213 has 8 divisors (see below), whose sum is σ = 147369600. Its totient is φ = 110398320.

The previous prime is 128873197. The next prime is 128873249. The reversal of 128873213 is 312378821.

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

It is a cyclic number.

It is not a de Polignac number, because 128873213 - 2⁴ = 128873197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128873813) 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 in 7 ways as a sum of consecutive naturals, for example, 10688 + ... + 19286.

It is an arithmetic number, because the mean of its divisors is an integer number (18421200).

Almost surely, 2^128873213 is an apocalyptic number.

It is an amenable number.

128873213 is a deficient number, since it is larger than the sum of its proper divisors (18496387).

128873213 is an equidigital number, since it uses as much as digits as its factorization.

128873213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10747.

The product of its digits is 16128, while the sum is 35.

The square root of 128873213 is about 11352.2338330392. The cubic root of 128873213 is about 505.1118439988. Note that the first 3 decimals are identical.

The spelling of 128873213 in words is "one hundred twenty-eight million, eight hundred seventy-three thousand, two hundred thirteen".