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87110430069 = 31323297132687
BaseRepresentation
bin101000100100000101…
…1111010110101110101
322022211212122100100210
41101020023322311311
52411400232230234
6104003514500033
76202451303265
oct1211013726565
9268755570323
1087110430069
1133a41626473
1214a71134619
1382a3293aa0
14430523d7a5
1523ec84cbe9
hex14482fad75

87110430069 has 32 divisors (see below), whose sum is σ = 130567901184. Its totient is φ = 51256877760.

The previous prime is 87110430067. The next prime is 87110430079. The reversal of 87110430069 is 96003401178.

It is not a de Polignac number, because 87110430069 - 21 = 87110430067 is a prime.

It is a super-2 number, since 2×871104300692 (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87110430067) 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 31 ways as a sum of consecutive naturals, for example, 2648644 + ... + 2681330.

It is an arithmetic number, because the mean of its divisors is an integer number (4080246912).

Almost surely, 287110430069 is an apocalyptic number.

It is an amenable number.

87110430069 is a deficient number, since it is larger than the sum of its proper divisors (43457471115).

87110430069 is a wasteful number, since it uses less digits than its factorization.

87110430069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35697.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 87110430069 in words is "eighty-seven billion, one hundred ten million, four hundred thirty thousand, sixty-nine".

Divisors: 1 3 13 23 39 69 299 897 2971 8913 32687 38623 68333 98061 115869 204999 424931 751801 888329 1274793 2255403 2664987 9773413 29320239 97113077 291339231 1262470001 2233600771 3787410003 6700802313 29036810023 87110430069