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87100107093 = 3247057205661
BaseRepresentation
bin101000100011110010…
…0100010100101010101
322022211011012212220100
41101013210202211111
52411340111411333
6104002505324313
76202264460166
oct1210744424525
9268734185810
1087100107093
1133a3681568a
1214a69796699
1382a10bb20c
144303b1376d
1523eb9ae213
hex1447922955

87100107093 has 12 divisors (see below), whose sum is σ = 125814551148. Its totient is φ = 58065221760.

The previous prime is 87100107077. The next prime is 87100107109. The reversal of 87100107093 is 39070100178.

It is an interprime number because it is at equal distance from previous prime (87100107077) and next prime (87100107109).

It can be written as a sum of positive squares in 2 ways, for example, as 1708747569 + 85391359524 = 41337^2 + 292218^2 .

It is not a de Polignac number, because 87100107093 - 24 = 87100107077 is a prime.

It is a super-2 number, since 2×871001070932 (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87100107293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320683 + ... + 526343.

It is an arithmetic number, because the mean of its divisors is an integer number (10484545929).

Almost surely, 287100107093 is an apocalyptic number.

It is an amenable number.

87100107093 is a deficient number, since it is larger than the sum of its proper divisors (38714444055).

87100107093 is a wasteful number, since it uses less digits than its factorization.

87100107093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252724 (or 252721 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The spelling of 87100107093 in words is "eighty-seven billion, one hundred million, one hundred seven thousand, ninety-three".

Divisors: 1 3 9 47057 141171 205661 423513 616983 1850949 9677789677 29033369031 87100107093