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87197 = 117927
BaseRepresentation
bin10101010010011101
311102121112
4111102131
510242242
61511405
7512135
oct252235
9142545
1087197
115a570
1242565
13308c6
1423ac5
151ac82
hex1549d

87197 has 4 divisors (see below), whose sum is σ = 95136. Its totient is φ = 79260.

The previous prime is 87187. The next prime is 87211. The reversal of 87197 is 79178.

Added to its reverse (79178) it gives a cube (166375 = 553).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87197 - 24 = 87181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87107) 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, 3953 + ... + 3974.

It is an arithmetic number, because the mean of its divisors is an integer number (23784).

287197 is an apocalyptic number.

It is an amenable number.

87197 is a deficient number, since it is larger than the sum of its proper divisors (7939).

87197 is a wasteful number, since it uses less digits than its factorization.

87197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7938.

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

The square root of 87197 is about 295.2913815200. The cubic root of 87197 is about 44.3438960768.

Adding to 87197 its reverse (79178), we get a cube (166375 = 553).

The spelling of 87197 in words is "eighty-seven thousand, one hundred ninety-seven".

Divisors: 1 11 7927 87197