128622829 has 2 divisors, whose sum is σ = 128622830. Its totient is φ = 128622828.

The previous prime is 128622827. The next prime is 128622883. The reversal of 128622829 is 928226821.

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., 82355625 + 46267204 = 9075^2 + 6802^2 .

It is an emirp because it is prime and its reverse (928226821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128622829 - 2¹ = 128622827 is a prime.

Together with 128622827, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 128622791 and 128622800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128622827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64311414 + 64311415.

It is an arithmetic number, because the mean of its divisors is an integer number (64311415).

Almost surely, 2^128622829 is an apocalyptic number.

It is an amenable number.

128622829 is a deficient number, since it is larger than the sum of its proper divisors (1).

128622829 is an equidigital number, since it uses as much as digits as its factorization.

128622829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 40.

The square root of 128622829 is about 11341.2005096462. The cubic root of 128622829 is about 504.7845095700.

The spelling of 128622829 in words is "one hundred twenty-eight million, six hundred twenty-two thousand, eight hundred twenty-nine".