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8387201 = 19343457
BaseRepresentation
bin11111111111101010000001
3120210010002002
4133333222001
54121342301
6455433345
7131201324
oct37775201
916703062
108387201
114809479
122985855
131978754
1411847bb
15b0a16b
hex7ffa81

8387201 has 4 divisors (see below), whose sum is σ = 8430852. Its totient is φ = 8343552.

The previous prime is 8387191. The next prime is 8387219. The reversal of 8387201 is 1027838.

8387201 = T193 + T194 + ... + T385.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3441025 + 4946176 = 1855^2 + 2224^2 .

It is a cyclic number.

It is not a de Polignac number, because 8387201 - 210 = 8386177 is a prime.

It is a super-2 number, since 2×83872012 = 140690281228802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8387221) 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, 21536 + ... + 21921.

It is an arithmetic number, because the mean of its divisors is an integer number (2107713).

Almost surely, 28387201 is an apocalyptic number.

It is an amenable number.

8387201 is a deficient number, since it is larger than the sum of its proper divisors (43651).

8387201 is a wasteful number, since it uses less digits than its factorization.

8387201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43650.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 8387201 is about 2896.0664702316. The cubic root of 8387201 is about 203.1759739842.

The spelling of 8387201 in words is "eight million, three hundred eighty-seven thousand, two hundred one".

Divisors: 1 193 43457 8387201