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108468649 = 257422057
BaseRepresentation
bin1100111011100…
…01100110101001
321120002210000101
412131301212221
5210231444044
614432505401
72454653062
oct635614651
9246083011
10108468649
1156256113
12303ab261
131961a343
1410597569
1597c8cd4
hex67719a9

108468649 has 4 divisors (see below), whose sum is σ = 108890964. Its totient is φ = 108046336.

The previous prime is 108468629. The next prime is 108468673. The reversal of 108468649 is 946864801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946864801 = 5351176951.

It can be written as a sum of positive squares in 2 ways, for example, as 57274624 + 51194025 = 7568^2 + 7155^2 .

It is a cyclic number.

It is not a de Polignac number, because 108468649 - 217 = 108337577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 108468599 and 108468608.

It is not an unprimeable number, because it can be changed into a prime (108468629) 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, 210772 + ... + 211285.

It is an arithmetic number, because the mean of its divisors is an integer number (27222741).

Almost surely, 2108468649 is an apocalyptic number.

It is an amenable number.

108468649 is a deficient number, since it is larger than the sum of its proper divisors (422315).

108468649 is an equidigital number, since it uses as much as digits as its factorization.

108468649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422314.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 108468649 is about 10414.8283231170. The cubic root of 108468649 is about 476.9081493320.

The spelling of 108468649 in words is "one hundred eight million, four hundred sixty-eight thousand, six hundred forty-nine".

Divisors: 1 257 422057 108468649