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68441 = 89769
BaseRepresentation
bin10000101101011001
310110212212
4100231121
54142231
61244505
7403352
oct205531
9113785
1068441
114746a
1233735
13251c9
141ad29
151542b
hex10b59

68441 has 4 divisors (see below), whose sum is σ = 69300. Its totient is φ = 67584.

The previous prime is 68437. The next prime is 68443. The reversal of 68441 is 14486.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14486 = 27243.

It can be written as a sum of positive squares in 2 ways, for example, as 19600 + 48841 = 140^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 68441 - 22 = 68437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68443) 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, 296 + ... + 473.

It is an arithmetic number, because the mean of its divisors is an integer number (17325).

268441 is an apocalyptic number.

It is an amenable number.

68441 is a deficient number, since it is larger than the sum of its proper divisors (859).

68441 is an equidigital number, since it uses as much as digits as its factorization.

68441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858.

The product of its digits is 768, while the sum is 23.

The square root of 68441 is about 261.6123085789. The cubic root of 68441 is about 40.9045967379.

The spelling of 68441 in words is "sixty-eight thousand, four hundred forty-one".

Divisors: 1 89 769 68441