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8449 = 71771
BaseRepresentation
bin10000100000001
3102120221
42010001
5232244
6103041
733430
oct20401
912527
108449
116391
124a81
133acc
143117
152784
hex2101

8449 has 8 divisors (see below), whose sum is σ = 10368. Its totient is φ = 6720.

The previous prime is 8447. The next prime is 8461. The reversal of 8449 is 9448.

Subtracting 8449 from its reverse (9448), we obtain a palindrome (999).

8449 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

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

It is not a de Polignac number, because 8449 - 21 = 8447 is a prime.

It is a Duffinian number.

8449 is a lucky number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (8443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84 + ... + 154.

It is an arithmetic number, because the mean of its divisors is an integer number (1296).

It is a Proth number, since it is equal to 33 ⋅ 28 + 1 and 33 < 28.

28449 is an apocalyptic number.

It is an amenable number.

8449 is a deficient number, since it is larger than the sum of its proper divisors (1919).

8449 is a wasteful number, since it uses less digits than its factorization.

8449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95.

The product of its digits is 1152, while the sum is 25.

The square root of 8449 is about 91.9184421104. The cubic root of 8449 is about 20.3673770523.

The spelling of 8449 in words is "eight thousand, four hundred forty-nine".

Divisors: 1 7 17 71 119 497 1207 8449