128630233 has 2 divisors, whose sum is σ = 128630234. Its totient is φ = 128630232.

The previous prime is 128630219. The next prime is 128630239. The reversal of 128630233 is 332036821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128210329 + 419904 = 11323^2 + 648^2 .

It is a cyclic number.

It is not a de Polignac number, because 128630233 - 2²⁵ = 95075801 is a prime.

It is not a weakly prime, because it can be changed into another prime (128630239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64315116 + 64315117.

It is an arithmetic number, because the mean of its divisors is an integer number (64315117).

Almost surely, 2^128630233 is an apocalyptic number.

It is an amenable number.

128630233 is a deficient number, since it is larger than the sum of its proper divisors (1).

128630233 is an equidigital number, since it uses as much as digits as its factorization.

128630233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 128630233 is about 11341.5269254188. The cubic root of 128630233 is about 504.7941951311.

The spelling of 128630233 in words is "one hundred twenty-eight million, six hundred thirty thousand, two hundred thirty-three".