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68104969 = 97170139
BaseRepresentation
bin1000000111100…
…11001100001001
311202011002110021
410003303030021
5114413324334
610431420441
71454611522
oct403631411
9152132407
1068104969
11354972a9
121a984721
13111570ca
14908b849
155ea43b4
hex40f3309

68104969 has 4 divisors (see below), whose sum is σ = 68176080. Its totient is φ = 68033860.

The previous prime is 68104937. The next prime is 68104973. The reversal of 68104969 is 96940186.

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.

It is a cyclic number.

It is not a de Polignac number, because 68104969 - 25 = 68104937 is a prime.

It is a super-2 number, since 2×681049692 = 9276573604981922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68104999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34099 + ... + 36040.

It is an arithmetic number, because the mean of its divisors is an integer number (17044020).

Almost surely, 268104969 is an apocalyptic number.

It is an amenable number.

68104969 is a deficient number, since it is larger than the sum of its proper divisors (71111).

68104969 is an equidigital number, since it uses as much as digits as its factorization.

68104969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71110.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 68104969 is about 8252.5734774069. The cubic root of 68104969 is about 408.3754253800.

The spelling of 68104969 in words is "sixty-eight million, one hundred four thousand, nine hundred sixty-nine".

Divisors: 1 971 70139 68104969