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13889 = 171943
BaseRepresentation
bin11011001000001
3201001102
43121001
5421024
6144145
755331
oct33101
921042
1013889
11a487
128055
136425
1450c1
1541ae
hex3641

13889 has 8 divisors (see below), whose sum is σ = 15840. Its totient is φ = 12096.

The previous prime is 13883. The next prime is 13901. The reversal of 13889 is 98831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13889 - 24 = 13873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (13883) 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, 302 + ... + 344.

It is an arithmetic number, because the mean of its divisors is an integer number (1980).

213889 is an apocalyptic number.

13889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13889 is a deficient number, since it is larger than the sum of its proper divisors (1951).

13889 is a wasteful number, since it uses less digits than its factorization.

13889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79.

The product of its digits is 1728, while the sum is 29.

The square root of 13889 is about 117.8516016013. The cubic root of 13889 is about 24.0375569383.

The spelling of 13889 in words is "thirteen thousand, eight hundred eighty-nine".

Divisors: 1 17 19 43 323 731 817 13889