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87030713 = 7211612647
BaseRepresentation
bin1010010111111…
…11101110111001
320001202121200202
411023333232321
5134234440323
612345211545
72104514600
oct513775671
9201677622
1087030713
1145143510
1225190bb5
1315052583
14b7b6a37
157991d28
hex52ffbb9

87030713 has 24 divisors (see below), whose sum is σ = 112296384. Its totient is φ = 66679200.

The previous prime is 87030709. The next prime is 87030731. The reversal of 87030713 is 31703078.

It is not a de Polignac number, because 87030713 - 22 = 87030709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87030703) 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 23 ways as a sum of consecutive naturals, for example, 31556 + ... + 34202.

It is an arithmetic number, because the mean of its divisors is an integer number (4679016).

Almost surely, 287030713 is an apocalyptic number.

It is an amenable number.

87030713 is a deficient number, since it is larger than the sum of its proper divisors (25265671).

87030713 is a wasteful number, since it uses less digits than its factorization.

87030713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733 (or 2726 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 87030713 is about 9329.0252974252. The cubic root of 87030713 is about 443.1568980906.

The spelling of 87030713 in words is "eighty-seven million, thirty thousand, seven hundred thirteen".

Divisors: 1 7 11 49 61 77 427 539 671 2647 2989 4697 18529 29117 32879 129703 161467 203819 1130269 1426733 1776137 7911883 12432959 87030713