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13384817 = 25752081
BaseRepresentation
bin110011000011…
…110001110001
3221012000111222
4303003301301
511411303232
61154514425
7221524535
oct63036161
927160458
1013384817
117612236
124595a15
132a08414
141ac5bc5
151295d12
hexcc3c71

13384817 has 4 divisors (see below), whose sum is σ = 13437156. Its totient is φ = 13332480.

The previous prime is 13384807. The next prime is 13384841. The reversal of 13384817 is 71848331.

13384817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71848331 = 109659159.

It can be written as a sum of positive squares in 2 ways, for example, as 7890481 + 5494336 = 2809^2 + 2344^2 .

It is a cyclic number.

It is not a de Polignac number, because 13384817 - 26 = 13384753 is a prime.

It is a super-2 number, since 2×133848172 = 358306652246978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13384807) 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, 25784 + ... + 26297.

It is an arithmetic number, because the mean of its divisors is an integer number (3359289).

Almost surely, 213384817 is an apocalyptic number.

It is an amenable number.

13384817 is a deficient number, since it is larger than the sum of its proper divisors (52339).

13384817 is an equidigital number, since it uses as much as digits as its factorization.

13384817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52338.

The product of its digits is 16128, while the sum is 35.

The square root of 13384817 is about 3658.5266160027. The cubic root of 13384817 is about 237.4310314975.

The spelling of 13384817 in words is "thirteen million, three hundred eighty-four thousand, eight hundred seventeen".

Divisors: 1 257 52081 13384817