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BaseRepresentation
bin1101100011000001
32211010011
431203001
53233424
61104521
7320530
oct154301
984104
1055489
1138765
1228141
131c345
1416317
1511694
hexd8c1

55489 has 4 divisors (see below), whose sum is σ = 63424. Its totient is φ = 47556.

The previous prime is 55487. The next prime is 55501. The reversal of 55489 is 98455.

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 55489 - 21 = 55487 is a prime.

It is a Duffinian number.

55489 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 55489.

It is not an unprimeable number, because it can be changed into a prime (55487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3957 + ... + 3970.

It is an arithmetic number, because the mean of its divisors is an integer number (15856).

255489 is an apocalyptic number.

It is an amenable number.

55489 is a deficient number, since it is larger than the sum of its proper divisors (7935).

55489 is an equidigital number, since it uses as much as digits as its factorization.

55489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7934.

The product of its digits is 7200, while the sum is 31.

The square root of 55489 is about 235.5610324311. The cubic root of 55489 is about 38.1418979111.

The spelling of 55489 in words is "fifty-five thousand, four hundred eighty-nine".

Divisors: 1 7 7927 55489