128683211 has 4 divisors (see below), whose sum is σ = 128783424. Its totient is φ = 128583000.

The previous prime is 128683199. The next prime is 128683223. The reversal of 128683211 is 112386821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112386821 = 43 ⋅2613647.

It is an interprime number because it is at equal distance from previous prime (128683199) and next prime (128683223).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128683211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128653211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48155 + ... + 50756.

It is an arithmetic number, because the mean of its divisors is an integer number (32195856).

Almost surely, 2^128683211 is an apocalyptic number.

128683211 is a deficient number, since it is larger than the sum of its proper divisors (100213).

128683211 is an equidigital number, since it uses as much as digits as its factorization.

128683211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100212.

The product of its digits is 4608, while the sum is 32.

The square root of 128683211 is about 11343.8622611525. The cubic root of 128683211 is about 504.8634875921.

The spelling of 128683211 in words is "one hundred twenty-eight million, six hundred eighty-three thousand, two hundred eleven".