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BaseRepresentation
bin11101100001
32120222
4131201
530024
612425
75336
oct3541
92528
101889
111468
121115
13b24
1498d
1585e
hex761

1889 has 2 divisors, whose sum is σ = 1890. Its totient is φ = 1888.

The previous prime is 1879. The next prime is 1901. The reversal of 1889 is 9881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1600 + 289 = 40^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 1889 - 24 = 1873 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 10, base 11 and base 12.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (1879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944 + 945.

It is an arithmetic number, because the mean of its divisors is an integer number (945).

21889 is an apocalyptic number.

It is an amenable number.

1889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889 is an equidigital number, since it uses as much as digits as its factorization.

1889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 26.

The square root of 1889 is about 43.4626276242. The cubic root of 1889 is about 12.3616749405.

The spelling of 1889 in words is "one thousand, eight hundred eighty-nine".