128622607 has 4 divisors (see below), whose sum is σ = 128647656. Its totient is φ = 128597560.

The previous prime is 128622583. The next prime is 128622623. The reversal of 128622607 is 706226821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128622607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128622107) 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 in 3 ways as a sum of consecutive naturals, for example, 1708 + ... + 16129.

It is an arithmetic number, because the mean of its divisors is an integer number (32161914).

Almost surely, 2^128622607 is an apocalyptic number.

128622607 is a deficient number, since it is larger than the sum of its proper divisors (25049).

128622607 is an equidigital number, since it uses as much as digits as its factorization.

128622607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25048.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 128622607 is about 11341.1907223184. The cubic root of 128622607 is about 504.7842191544.

The spelling of 128622607 in words is "one hundred twenty-eight million, six hundred twenty-two thousand, six hundred seven".