128654633 has 4 divisors (see below), whose sum is σ = 130835280. Its totient is φ = 126473988.

The previous prime is 128654611. The next prime is 128654641. The reversal of 128654633 is 336456821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128654633 - 2²⁴ = 111877417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128650633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090235 + ... + 1090352.

It is an arithmetic number, because the mean of its divisors is an integer number (32708820).

Almost surely, 2^128654633 is an apocalyptic number.

It is an amenable number.

128654633 is a deficient number, since it is larger than the sum of its proper divisors (2180647).

128654633 is an equidigital number, since it uses as much as digits as its factorization.

128654633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180646.

The product of its digits is 103680, while the sum is 38.

The square root of 128654633 is about 11342.6025673123. The cubic root of 128654633 is about 504.8261114216.

The spelling of 128654633 in words is "one hundred twenty-eight million, six hundred fifty-four thousand, six hundred thirty-three".