Base | Representation |
---|---|
bin | 1110001001001… |
… | …00011000111111 |
3 | 22021020102221022 |
4 | 13010210120333 |
5 | 220332410033 |
6 | 15434454355 |
7 | 2640256541 |
oct | 704443077 |
9 | 267212838 |
10 | 118638143 |
11 | 60a71658 |
12 | 338943bb |
13 | 1b76b0b0 |
14 | 11a83691 |
15 | a637098 |
hex | 712463f |
118638143 has 4 divisors (see below), whose sum is σ = 127764168. Its totient is φ = 109512120.
The previous prime is 118638137. The next prime is 118638151. The reversal of 118638143 is 341836811.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341836811 = 661 ⋅517151.
It is a cyclic number.
It is not a de Polignac number, because 118638143 - 210 = 118637119 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 (118638343) 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, 4562993 + ... + 4563018.
It is an arithmetic number, because the mean of its divisors is an integer number (31941042).
Almost surely, 2118638143 is an apocalyptic number.
118638143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.
118638143 is a deficient number, since it is larger than the sum of its proper divisors (9126025).
118638143 is an equidigital number, since it uses as much as digits as its factorization.
118638143 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 9126024.
The product of its digits is 13824, while the sum is 35.
The square root of 118638143 is about 10892.1137985241. The cubic root of 118638143 is about 491.3694068824.
The spelling of 118638143 in words is "one hundred eighteen million, six hundred thirty-eight thousand, one hundred forty-three".
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