48781 has 2 divisors, whose sum is σ = 48782. Its totient is φ = 48780.
The previous prime is 48779. The next prime is 48787. The reversal of 48781 is 18784.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 28900 + 19881 = 170^2 + 141^2 .
It is a cyclic number.
It is not a de Polignac number, because 48781 - 21 = 48779 is a prime.
It is a super-2 number, since 2×487812 = 4759171922, which contains 22 as substring.
Together with 48779, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (48787) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24390 + 24391.
It is an arithmetic number, because the mean of its divisors is an integer number (24391).
248781 is an apocalyptic number.
It is an amenable number.
48781 is a deficient number, since it is larger than the sum of its proper divisors (1).
48781 is an equidigital number, since it uses as much as digits as its factorization.
48781 is an evil number, because the sum of its binary digits is even.
The product of its digits is 1792, while the sum is 28.
The square root of 48781 is about 220.8642116777. The cubic root of 48781 is about 36.5384594929.
The spelling of 48781 in words is "forty-eight thousand, seven hundred eighty-one".
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