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68171801 = 833172591
BaseRepresentation
bin1000001000000…
…11100000011001
311202021111010112
410010003200121
5114422444201
610433054105
71455310415
oct404034031
9152244115
1068171801
1135532535
121a9b7335
131117b659
1490a7d45
155eb90bb
hex4103819

68171801 has 8 divisors (see below), whose sum is σ = 69237504. Its totient is φ = 67112080.

The previous prime is 68171783. The next prime is 68171809. The reversal of 68171801 is 10817186.

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

It is a cyclic number.

It is not a de Polignac number, because 68171801 - 26 = 68171737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68171809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25016 + ... + 27606.

It is an arithmetic number, because the mean of its divisors is an integer number (8654688).

Almost surely, 268171801 is an apocalyptic number.

It is an amenable number.

68171801 is a deficient number, since it is larger than the sum of its proper divisors (1065703).

68171801 is a wasteful number, since it uses less digits than its factorization.

68171801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 68171801 is about 8256.6216456854. The cubic root of 68171801 is about 408.5089624979.

Adding to 68171801 its reverse (10817186), we get a palindrome (78988987).

The spelling of 68171801 in words is "sixty-eight million, one hundred seventy-one thousand, eight hundred one".

Divisors: 1 83 317 2591 26311 215053 821347 68171801