128373227 has 4 divisors (see below), whose sum is σ = 132799920. Its totient is φ = 123946536.

The previous prime is 128373221. The next prime is 128373257. The reversal of 128373227 is 722373821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 722373821 = 13 ⋅55567217.

It is a cyclic number.

It is not a de Polignac number, because 128373227 - 2¹⁸ = 128111083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128373221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2213303 + ... + 2213360.

It is an arithmetic number, because the mean of its divisors is an integer number (33199980).

Almost surely, 2^128373227 is an apocalyptic number.

128373227 is a deficient number, since it is larger than the sum of its proper divisors (4426693).

128373227 is an equidigital number, since it uses as much as digits as its factorization.

128373227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426692.

The product of its digits is 28224, while the sum is 35.

The square root of 128373227 is about 11330.1909516124. The cubic root of 128373227 is about 504.4577743834.

The spelling of 128373227 in words is "one hundred twenty-eight million, three hundred seventy-three thousand, two hundred twenty-seven".