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87380875143 = 3317613120857
BaseRepresentation
bin101000101100001001…
…1100101011110000111
322100112201112101021000
41101120103211132013
52412424001001033
6104050415224343
76212244120012
oct1213023453607
9270481471230
1087380875143
11340702538a1
1214b278180b3
138317314363
14432d11c379
15241646ea13
hex14584e5787

87380875143 has 32 divisors (see below), whose sum is σ = 139315101120. Its totient is φ = 53928391680.

The previous prime is 87380875103. The next prime is 87380875147. The reversal of 87380875143 is 34157808378.

It is not a de Polignac number, because 87380875143 - 221 = 87378777991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87380875143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87380875147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1532430 + ... + 1588427.

It is an arithmetic number, because the mean of its divisors is an integer number (4353596910).

Almost surely, 287380875143 is an apocalyptic number.

87380875143 is a deficient number, since it is larger than the sum of its proper divisors (51934225977).

87380875143 is a wasteful number, since it uses less digits than its factorization.

87380875143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120944 (or 3120938 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 87380875143 in words is "eighty-seven billion, three hundred eighty million, eight hundred seventy-five thousand, one hundred forty-three".

Divisors: 1 3 9 17 27 51 61 153 183 459 549 1037 1647 3111 9333 27999 3120857 9362571 28087713 53054569 84263139 159163707 190372277 477491121 571116831 1432473363 1713350493 3236328709 5140051479 9708986127 29126958381 87380875143