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87993205223 = 7111439794141
BaseRepresentation
bin101000111110011001…
…1011100000111100111
322102010101201222012212
41101330303130013213
52420202230031343
6104231251434035
76233360621630
oct1217463340747
9272111658185
1087993205223
1134354963510
12150788b591b
1383b4139251
14438a594887
1524500c5c18
hex147ccdc1e7

87993205223 has 16 divisors (see below), whose sum is σ = 109782190080. Its totient is φ = 68518399200.

The previous prime is 87993205193. The next prime is 87993205241. The reversal of 87993205223 is 32250239978.

It is a cyclic number.

It is not a de Polignac number, because 87993205223 - 28 = 87993204967 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 (87993205243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286268 + ... + 507873.

It is an arithmetic number, because the mean of its divisors is an integer number (6861386880).

Almost surely, 287993205223 is an apocalyptic number.

87993205223 is a deficient number, since it is larger than the sum of its proper divisors (21788984857).

87993205223 is a wasteful number, since it uses less digits than its factorization.

87993205223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795598.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 87993205223 in words is "eighty-seven billion, nine hundred ninety-three million, two hundred five thousand, two hundred twenty-three".

Divisors: 1 7 11 77 1439 10073 15829 110803 794141 5558987 8735551 61148857 1142768899 7999382293 12570457889 87993205223