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68007197 = 456714891
BaseRepresentation
bin1000000110110…
…11010100011101
311201222010100002
410003123110131
5114402212242
610425344045
71454023466
oct403332435
9151863302
1068007197
113542a8a5
121a938025
131112175b
149063d6d
155e85432
hex40db51d

68007197 has 4 divisors (see below), whose sum is σ = 68026656. Its totient is φ = 67987740.

The previous prime is 68007169. The next prime is 68007223. The reversal of 68007197 is 79170086.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79170086 = 239585043.

It is a cyclic number.

It is not a de Polignac number, because 68007197 - 216 = 67941661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68007197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68007997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2879 + ... + 12012.

It is an arithmetic number, because the mean of its divisors is an integer number (17006664).

Almost surely, 268007197 is an apocalyptic number.

It is an amenable number.

68007197 is a deficient number, since it is larger than the sum of its proper divisors (19459).

68007197 is a wasteful number, since it uses less digits than its factorization.

68007197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19458.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 68007197 is about 8246.6476219128. The cubic root of 68007197 is about 408.1799095228.

The spelling of 68007197 in words is "sixty-eight million, seven thousand, one hundred ninety-seven".

Divisors: 1 4567 14891 68007197