655006129 has 2 divisors, whose sum is σ = 655006130. Its totient is φ = 655006128.

The previous prime is 655006127. The next prime is 655006159. The reversal of 655006129 is 921600556.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 539400625 + 115605504 = 23225^2 + 10752^2 .

It is a cyclic number.

It is not a de Polignac number, because 655006129 - 2¹ = 655006127 is a prime.

Together with 655006127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 655006094 and 655006103.

It is not a weakly prime, because it can be changed into another prime (655006127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327503064 + 327503065.

It is an arithmetic number, because the mean of its divisors is an integer number (327503065).

Almost surely, 2^655006129 is an apocalyptic number.

It is an amenable number.

655006129 is a deficient number, since it is larger than the sum of its proper divisors (1).

655006129 is an equidigital number, since it uses as much as digits as its factorization.

655006129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 655006129 is about 25593.0875237827. The cubic root of 655006129 is about 868.4572690460.

The spelling of 655006129 in words is "six hundred fifty-five million, six thousand, one hundred twenty-nine".