128279227 has 2 divisors, whose sum is σ = 128279228. Its totient is φ = 128279226.

The previous prime is 128279219. The next prime is 128279233. The reversal of 128279227 is 722972821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128279227 - 2³ = 128279219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128279227.

It is not a weakly prime, because it can be changed into another prime (128279927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64139613 + 64139614.

It is an arithmetic number, because the mean of its divisors is an integer number (64139614).

Almost surely, 2^128279227 is an apocalyptic number.

128279227 is a deficient number, since it is larger than the sum of its proper divisors (1).

128279227 is an equidigital number, since it uses as much as digits as its factorization.

128279227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 128279227 is about 11326.0419829700. The cubic root of 128279227 is about 504.3346162799.

The spelling of 128279227 in words is "one hundred twenty-eight million, two hundred seventy-nine thousand, two hundred twenty-seven".