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61889 = 199311
BaseRepresentation
bin1111000111000001
310010220012
433013001
53440024
61154305
7345302
oct170701
9103805
1061889
1142553
122b995
1322229
14187a9
151350e
hexf1c1

61889 has 4 divisors (see below), whose sum is σ = 62400. Its totient is φ = 61380.

The previous prime is 61879. The next prime is 61909. The reversal of 61889 is 98816.

61889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61889 - 212 = 57793 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 61889.

It is not an unprimeable number, because it can be changed into a prime (61819) 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, 44 + ... + 354.

It is an arithmetic number, because the mean of its divisors is an integer number (15600).

261889 is an apocalyptic number.

It is an amenable number.

61889 is a deficient number, since it is larger than the sum of its proper divisors (511).

61889 is a wasteful number, since it uses less digits than its factorization.

61889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510.

The product of its digits is 3456, while the sum is 32.

The square root of 61889 is about 248.7749987438. The cubic root of 61889 is about 39.5552823114. Note that the first 3 decimals are identical.

It can be divided in two parts, 618 and 89, that added together give a palindrome (707).

The spelling of 61889 in words is "sixty-one thousand, eight hundred eighty-nine".

Divisors: 1 199 311 61889