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8108117 = 19426743
BaseRepresentation
bin11110111011100001010101
3120020221020122
4132323201111
54033424432
6445441325
7125626553
oct36734125
916227218
108108117
114638826
122870245
1318ab704
141110bd3
15aa2612
hex7bb855

8108117 has 4 divisors (see below), whose sum is σ = 8534880. Its totient is φ = 7681356.

The previous prime is 8108083. The next prime is 8108137. The reversal of 8108117 is 7118018.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7118018 = 23559009.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-8108117 is a prime.

It is a super-2 number, since 2×81081172 = 131483122571378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8108137) 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, 213353 + ... + 213390.

It is an arithmetic number, because the mean of its divisors is an integer number (2133720).

Almost surely, 28108117 is an apocalyptic number.

It is an amenable number.

8108117 is a deficient number, since it is larger than the sum of its proper divisors (426763).

8108117 is a wasteful number, since it uses less digits than its factorization.

8108117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426762.

The product of its (nonzero) digits is 448, while the sum is 26.

The square root of 8108117 is about 2847.4755486220. The cubic root of 8108117 is about 200.8969464222.

Subtracting from 8108117 its reverse (7118018), we obtain a palindrome (990099).

The spelling of 8108117 in words is "eight million, one hundred eight thousand, one hundred seventeen".

Divisors: 1 19 426743 8108117