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68808601 = 569120929
BaseRepresentation
bin1000001100111…
…10111110011001
311210110211122201
410012132332121
5120103333401
610454450201
71463602111
oct406367631
9153424581
1068808601
1135927a14
121b063961
1311342464
1491d2041
156092b01
hex419ef99

68808601 has 4 divisors (see below), whose sum is σ = 68930100. Its totient is φ = 68687104.

The previous prime is 68808563. The next prime is 68808613. The reversal of 68808601 is 10680886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10680886 = 25340443.

It can be written as a sum of positive squares in 2 ways, for example, as 34234201 + 34574400 = 5851^2 + 5880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-68808601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68808001) 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, 59896 + ... + 61033.

It is an arithmetic number, because the mean of its divisors is an integer number (17232525).

Almost surely, 268808601 is an apocalyptic number.

It is an amenable number.

68808601 is a deficient number, since it is larger than the sum of its proper divisors (121499).

68808601 is a wasteful number, since it uses less digits than its factorization.

68808601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121498.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 68808601 is about 8295.0949964422. The cubic root of 68808601 is about 409.7769975075.

The spelling of 68808601 in words is "sixty-eight million, eight hundred eight thousand, six hundred one".

Divisors: 1 569 120929 68808601