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BaseRepresentation
bin10111001111001
3121022122
42321321
5340042
6131025
746454
oct27171
917278
1011897
118a36
126a75
135552
14449b
1537d2
hex2e79

11897 has 2 divisors, whose sum is σ = 11898. Its totient is φ = 11896.

The previous prime is 11887. The next prime is 11903. The reversal of 11897 is 79811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11881 + 16 = 109^2 + 4^2 .

It is an emirp because it is prime and its reverse (79811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11897 - 26 = 11833 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (11807) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5948 + 5949.

It is an arithmetic number, because the mean of its divisors is an integer number (5949).

211897 is an apocalyptic number.

It is an amenable number.

11897 is a deficient number, since it is larger than the sum of its proper divisors (1).

11897 is an equidigital number, since it uses as much as digits as its factorization.

11897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 26.

The square root of 11897 is about 109.0733698022. The cubic root of 11897 is about 22.8285934478.

The spelling of 11897 in words is "eleven thousand, eight hundred ninety-seven".