6550129 has 2 divisors, whose sum is σ = 6550130. Its totient is φ = 6550128.

The previous prime is 6550123. The next prime is 6550157. The reversal of 6550129 is 9210556.

It is an a-pointer prime, because the next prime (6550157) can be obtained adding 6550129 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6426225 + 123904 = 2535^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 6550129 - 2⁷ = 6550001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6550097 and 6550106.

It is not a weakly prime, because it can be changed into another prime (6550123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275064 + 3275065.

It is an arithmetic number, because the mean of its divisors is an integer number (3275065).

Almost surely, 2^6550129 is an apocalyptic number.

It is an amenable number.

6550129 is a deficient number, since it is larger than the sum of its proper divisors (1).

6550129 is an equidigital number, since it uses as much as digits as its factorization.

6550129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 6550129 is about 2559.3219805253. The cubic root of 6550129 is about 187.1040914374.

The spelling of 6550129 in words is "six million, five hundred fifty thousand, one hundred twenty-nine".