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84987 = 3271971
BaseRepresentation
bin10100101111111011
311022120200
4110233323
510204422
61453243
7502530
oct245773
9138520
1084987
1158941
1241223
132c8b6
1422d87
151a2ac
hex14bfb

84987 has 24 divisors (see below), whose sum is σ = 149760. Its totient is φ = 45360.

The previous prime is 84979. The next prime is 84991. The reversal of 84987 is 78948.

It is not a de Polignac number, because 84987 - 23 = 84979 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 84987.

It is not an unprimeable number, because it can be changed into a prime (84947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1162 + ... + 1232.

It is an arithmetic number, because the mean of its divisors is an integer number (6240).

284987 is an apocalyptic number.

84987 is a deficient number, since it is larger than the sum of its proper divisors (64773).

84987 is a wasteful number, since it uses less digits than its factorization.

84987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 100 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 84987 is about 291.5252990737. The cubic root of 84987 is about 43.9660550863.

The spelling of 84987 in words is "eighty-four thousand, nine hundred eighty-seven".

Divisors: 1 3 7 9 19 21 57 63 71 133 171 213 399 497 639 1197 1349 1491 4047 4473 9443 12141 28329 84987