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68684795 = 513736959
BaseRepresentation
bin1000001100000…
…00101111111011
311210020112211022
410012000233323
5120040403140
610452053055
71462545134
oct406005773
9153215738
1068684795
11358529a3
121b00418b
13112cacba
14919cc8b
15606b0b5
hex4180bfb

68684795 has 4 divisors (see below), whose sum is σ = 82421760. Its totient is φ = 54947832.

The previous prime is 68684729. The next prime is 68684797. The reversal of 68684795 is 59748686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59748686 = 229874343.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-68684795 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68684797) 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, 6868475 + ... + 6868484.

It is an arithmetic number, because the mean of its divisors is an integer number (20605440).

Almost surely, 268684795 is an apocalyptic number.

68684795 is a deficient number, since it is larger than the sum of its proper divisors (13736965).

68684795 is a wasteful number, since it uses less digits than its factorization.

68684795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13736964.

The product of its digits is 2903040, while the sum is 53.

The square root of 68684795 is about 8287.6290336863. The cubic root of 68684795 is about 409.5310819862.

The spelling of 68684795 in words is "sixty-eight million, six hundred eighty-four thousand, seven hundred ninety-five".

Divisors: 1 5 13736959 68684795