128366627 has 2 divisors, whose sum is σ = 128366628. Its totient is φ = 128366626.

The previous prime is 128366593. The next prime is 128366681. The reversal of 128366627 is 726663821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128366627 is a prime.

It is not a weakly prime, because it can be changed into another prime (128366687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64183313 + 64183314.

It is an arithmetic number, because the mean of its divisors is an integer number (64183314).

Almost surely, 2^128366627 is an apocalyptic number.

128366627 is a deficient number, since it is larger than the sum of its proper divisors (1).

128366627 is an equidigital number, since it uses as much as digits as its factorization.

128366627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 128366627 is about 11329.8996906416. The cubic root of 128366627 is about 504.4491290751.

The spelling of 128366627 in words is "one hundred twenty-eight million, three hundred sixty-six thousand, six hundred twenty-seven".