6866129 has 2 divisors, whose sum is σ = 6866130. Its totient is φ = 6866128.

The previous prime is 6866077. The next prime is 6866131. The reversal of 6866129 is 9216686.

6866129 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4631104 + 2235025 = 2152^2 + 1495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6866129 is a prime.

Together with 6866131, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6866092 and 6866101.

It is not a weakly prime, because it can be changed into another prime (6866149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3433064 + 3433065.

It is an arithmetic number, because the mean of its divisors is an integer number (3433065).

Almost surely, 2^6866129 is an apocalyptic number.

It is an amenable number.

6866129 is a deficient number, since it is larger than the sum of its proper divisors (1).

6866129 is an equidigital number, since it uses as much as digits as its factorization.

6866129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 6866129 is about 2620.3299410570. The cubic root of 6866129 is about 190.0658036154.

The spelling of 6866129 in words is "six million, eight hundred sixty-six thousand, one hundred twenty-nine".