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87971 = 1367101
BaseRepresentation
bin10101011110100011
311110200012
4111132203
510303341
61515135
7514322
oct253643
9143605
1087971
1160104
1242aab
1331070
14240b9
151b0eb
hex157a3

87971 has 8 divisors (see below), whose sum is σ = 97104. Its totient is φ = 79200.

The previous prime is 87961. The next prime is 87973. The reversal of 87971 is 17978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-87971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821 + ... + 921.

It is an arithmetic number, because the mean of its divisors is an integer number (12138).

287971 is an apocalyptic number.

87971 is a deficient number, since it is larger than the sum of its proper divisors (9133).

87971 is a wasteful number, since it uses less digits than its factorization.

87971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181.

The product of its digits is 3528, while the sum is 32.

The square root of 87971 is about 296.5990559661. The cubic root of 87971 is about 44.4747152577.

The spelling of 87971 in words is "eighty-seven thousand, nine hundred seventy-one".

Divisors: 1 13 67 101 871 1313 6767 87971