Base | Representation |
---|---|
bin | 1111010111111… |
… | …00010100110101 |
3 | 22222122211120210 |
4 | 13223330110311 |
5 | 231003203142 |
6 | 20444020033 |
7 | 3124066041 |
oct | 753742465 |
9 | 288584523 |
10 | 128959797 |
11 | 6688144a |
12 | 37231619 |
13 | 20943195 |
14 | 131ad021 |
15 | b4c549c |
hex | 7afc535 |
128959797 has 4 divisors (see below), whose sum is σ = 171946400. Its totient is φ = 85973196.
The previous prime is 128959769. The next prime is 128959799. The reversal of 128959797 is 797959821.
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 not a de Polignac number, because 128959797 - 211 = 128957749 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (128959799) 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, 21493297 + ... + 21493302.
It is an arithmetic number, because the mean of its divisors is an integer number (42986600).
Almost surely, 2128959797 is an apocalyptic number.
It is an amenable number.
128959797 is a deficient number, since it is larger than the sum of its proper divisors (42986603).
128959797 is an equidigital number, since it uses as much as digits as its factorization.
128959797 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 42986602.
The product of its digits is 2857680, while the sum is 57.
The square root of 128959797 is about 11356.0467152967. The cubic root of 128959797 is about 505.2249391670.
The spelling of 128959797 in words is "one hundred twenty-eight million, nine hundred fifty-nine thousand, seven hundred ninety-seven".
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