• 727 can be written using four 4's:
727 has 2 divisors, whose sum is σ = 728. Its totient is φ = 726.
The previous prime is 719. The next prime is 733.
727 is nontrivially palindromic in base 10.
It is a strong prime.
It is a palprime.
It is a cyclic number.
It is not a de Polignac number, because 727 - 23 = 719 is a prime.
It is an alternating number because its digits alternate between odd and even.
727 is an undulating number in base 10.
727 is a lucky number.
It is a plaindrome in base 14 and base 15.
It is a nialpdrome in base 3, base 6 and base 9.
It is a self number, because there is not a number n which added to its sum of digits gives 727.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (757) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363 + 364.
It is an arithmetic number, because the mean of its divisors is an integer number (364).
727 is a deficient number, since it is larger than the sum of its proper divisors (1).
727 is an equidigital number, since it uses as much as digits as its factorization.
727 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 98, while the sum is 16.
The square root of 727 is about 26.9629375254. The cubic root of 727 is about 8.9917620091.
The spelling of 727 in words is "seven hundred twenty-seven", and thus it is an aban number, an iban number, and an oban number.
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