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87830283121 = 7661174110903
BaseRepresentation
bin101000111001100010…
…1111100001101110001
322101201001011200002221
41101303011330031301
52414334023024441
6104203151441041
76226342042240
oct1216305741561
9271631150087
1087830283121
11342809a5749
1215032226181
138389464739
144372aa4957
152440b428d1
hex147317c371

87830283121 has 16 divisors (see below), whose sum is σ = 100596291328. Its totient is φ = 75119140800.

The previous prime is 87830283071. The next prime is 87830283157. The reversal of 87830283121 is 12138203878.

It is a cyclic number.

It is not a de Polignac number, because 87830283121 - 27 = 87830282993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87830283161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8050156 + ... + 8061058.

It is an arithmetic number, because the mean of its divisors is an integer number (6287268208).

Almost surely, 287830283121 is an apocalyptic number.

It is an amenable number.

87830283121 is a deficient number, since it is larger than the sum of its proper divisors (12766008207).

87830283121 is a wasteful number, since it uses less digits than its factorization.

87830283121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13312.

The product of its (nonzero) digits is 129024, while the sum is 43.

Adding to 87830283121 its reverse (12138203878), we get a palindrome (99968486999).

The spelling of 87830283121 in words is "eighty-seven billion, eight hundred thirty million, two hundred eighty-three thousand, one hundred twenty-one".

Divisors: 1 7 661 1741 4627 10903 12187 76321 1150801 7206883 8055607 18982123 50448181 132874861 12547183303 87830283121