Base | Representation |
---|---|
bin | 1010011110000… |
… | …11111101110111 |
3 | 20010021110021011 |
4 | 11033003331313 |
5 | 134441200422 |
6 | 12414333051 |
7 | 2114403136 |
oct | 517037567 |
9 | 203243234 |
10 | 87834487 |
11 | 45642394 |
12 | 254ba187 |
13 | 15274390 |
14 | b94591d |
15 | 7aa0077 |
hex | 53c3f77 |
87834487 has 4 divisors (see below), whose sum is σ = 94591000. Its totient is φ = 81077976.
The previous prime is 87834469. The next prime is 87834547. The reversal of 87834487 is 78443878.
It is a happy number.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78443878 = 2 ⋅39221939.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-87834487 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 87834487.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (87834407) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3378237 + ... + 3378262.
It is an arithmetic number, because the mean of its divisors is an integer number (23647750).
Almost surely, 287834487 is an apocalyptic number.
87834487 is a deficient number, since it is larger than the sum of its proper divisors (6756513).
87834487 is a wasteful number, since it uses less digits than its factorization.
87834487 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6756512.
The product of its digits is 1204224, while the sum is 49.
The square root of 87834487 is about 9372.0054950902. The cubic root of 87834487 is about 444.5169812696.
The spelling of 87834487 in words is "eighty-seven million, eight hundred thirty-four thousand, four hundred eighty-seven".
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