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7808668093 = 29383370249
BaseRepresentation
bin1110100010110111…
…01101000110111101
3202011012101102212101
413101123231012331
5111443004334333
63330502505101
7364335404122
oct72133550675
922135342771
107808668093
113347875a06
12161b135191
13975a02385
14541100749
1530a80467d
hex1d16ed1bd

7808668093 has 8 divisors (see below), whose sum is σ = 8080155000. Its totient is φ = 7537329408.

The previous prime is 7808668081. The next prime is 7808668099. The reversal of 7808668093 is 3908668087.

It can be written as a sum of positive squares in 4 ways, for example, as 12131289 + 7796536804 = 3483^2 + 88298^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-7808668093 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 (7808668099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76033 + ... + 146281.

It is an arithmetic number, because the mean of its divisors is an integer number (1010019375).

Almost surely, 27808668093 is an apocalyptic number.

It is an amenable number.

7808668093 is a deficient number, since it is larger than the sum of its proper divisors (271486907).

7808668093 is a wasteful number, since it uses less digits than its factorization.

7808668093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74111.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 7808668093 is about 88366.6684502703. The cubic root of 7808668093 is about 1983.9268473349.

The spelling of 7808668093 in words is "seven billion, eight hundred eight million, six hundred sixty-eight thousand, ninety-three".

Divisors: 1 29 3833 70249 111157 2037221 269264417 7808668093