Base | Representation |
---|---|
bin | 11000111010010… |
… | …01110111110001 |
3 | 112120012201212001 |
4 | 30131021313301 |
5 | 411444003301 |
6 | 32422534001 |
7 | 5115131440 |
oct | 1435116761 |
9 | 476181761 |
10 | 208969201 |
11 | a7a59721 |
12 | 59b97301 |
13 | 343a791c |
14 | 1da78d57 |
15 | 1352bc01 |
hex | c749df1 |
208969201 has 16 divisors (see below), whose sum is σ = 251877760. Its totient is φ = 169361280.
The previous prime is 208969199. The next prime is 208969231. The reversal of 208969201 is 102969802.
It is a 3-Lehmer number, since φ(208969201) divides (208969201-1)3.
It is a cyclic number.
It is a Carmichael number.
It is not a de Polignac number, because 208969201 - 21 = 208969199 is a prime.
It is a deceptive number, since it divides R208969200.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (208969231) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86725 + ... + 89101.
It is an arithmetic number, because the mean of its divisors is an integer number (15742360).
It is a Poulet number, since it divides 2208969200-1.
Almost surely, 2208969201 is an apocalyptic number.
It is an amenable number.
208969201 is a deficient number, since it is larger than the sum of its proper divisors (42908559).
208969201 is a wasteful number, since it uses less digits than its factorization.
208969201 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3064.
The product of its (nonzero) digits is 15552, while the sum is 37.
The square root of 208969201 is about 14455.7670498663. The cubic root of 208969201 is about 593.4180617615.
The spelling of 208969201 in words is "two hundred eight million, nine hundred sixty-nine thousand, two hundred one".
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