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108649 is a prime number
BaseRepresentation
bin11010100001101001
312112001001
4122201221
511434044
62155001
7631522
oct324151
9175031
10108649
11746a2
1252a61
133a5b8
142b849
15222d4
hex1a869

108649 has 2 divisors, whose sum is σ = 108650. Its totient is φ = 108648.

The previous prime is 108643. The next prime is 108677. The reversal of 108649 is 946801.

It is an a-pointer prime, because the next prime (108677) can be obtained adding 108649 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94249 + 14400 = 307^2 + 120^2 .

It is an emirp because it is prime and its reverse (946801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-108649 is a prime.

It is a Chen prime.

108649 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (108643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54324 + 54325.

It is an arithmetic number, because the mean of its divisors is an integer number (54325).

2108649 is an apocalyptic number.

It is an amenable number.

108649 is a deficient number, since it is larger than the sum of its proper divisors (1).

108649 is an equidigital number, since it uses as much as digits as its factorization.

108649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 108649 is about 329.6194775798. The cubic root of 108649 is about 47.7172321626.

It can be divided in two parts, 108 and 649, that added together give a palindrome (757).

The spelling of 108649 in words is "one hundred eight thousand, six hundred forty-nine".