128934605 has 8 divisors (see below), whose sum is σ = 154975200. Its totient is φ = 102978576.

The previous prime is 128934601. The next prime is 128934629. The reversal of 128934605 is 506439821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128934605 - 2² = 128934601 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128934601) 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 7 ways as a sum of consecutive naturals, for example, 17735 + ... + 23924.

It is an arithmetic number, because the mean of its divisors is an integer number (19371900).

Almost surely, 2^128934605 is an apocalyptic number.

It is an amenable number.

128934605 is a deficient number, since it is larger than the sum of its proper divisors (26040595).

128934605 is an equidigital number, since it uses as much as digits as its factorization.

128934605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42283.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 128934605 is about 11354.9374723069. The cubic root of 128934605 is about 505.1920388476.

The spelling of 128934605 in words is "one hundred twenty-eight million, nine hundred thirty-four thousand, six hundred five".