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68648741 = 716975779
BaseRepresentation
bin1000001011101…
…11111100100101
311210011201100222
410011313330211
5120033224431
610451214125
71462335050
oct405677445
9153151328
1068648741
11358288a7
121aba7345
13112b7775
14918da97
15606057b
hex4177f25

68648741 has 8 divisors (see below), whose sum is σ = 78515520. Its totient is φ = 58796928.

The previous prime is 68648731. The next prime is 68648753. The reversal of 68648741 is 14784686.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-68648741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68648692 and 68648701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68648731) 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, 8990 + ... + 14768.

It is an arithmetic number, because the mean of its divisors is an integer number (9814440).

Almost surely, 268648741 is an apocalyptic number.

It is an amenable number.

68648741 is a deficient number, since it is larger than the sum of its proper divisors (9866779).

68648741 is a wasteful number, since it uses less digits than its factorization.

68648741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7483.

The product of its digits is 258048, while the sum is 44.

The square root of 68648741 is about 8285.4535784108. The cubic root of 68648741 is about 409.4594124709.

The spelling of 68648741 in words is "sixty-eight million, six hundred forty-eight thousand, seven hundred forty-one".

Divisors: 1 7 1697 5779 11879 40453 9806963 68648741