128000629 has 2 divisors, whose sum is σ = 128000630. Its totient is φ = 128000628.

The previous prime is 128000627. The next prime is 128000651. The reversal of 128000629 is 926000821.

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., 125955729 + 2044900 = 11223^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 128000629 - 2¹ = 128000627 is a prime.

It is a super-2 number, since 2×128000629² = 32768322048791282, which contains 22 as substring.

Together with 128000627, it forms a pair of twin primes.

It is equal to p_7271065 and since 128000629 and 7271065 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 128000597 and 128000606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128000623) 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, 64000314 + 64000315.

It is an arithmetic number, because the mean of its divisors is an integer number (64000315).

Almost surely, 2^128000629 is an apocalyptic number.

It is an amenable number.

128000629 is a deficient number, since it is larger than the sum of its proper divisors (1).

128000629 is an equidigital number, since it uses as much as digits as its factorization.

128000629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 128000629 is about 11313.7362970859. The cubic root of 128000629 is about 503.9692454674.

The spelling of 128000629 in words is "one hundred twenty-eight million, six hundred twenty-nine", and thus it is an aban number.