281653 has 2 divisors, whose sum is σ = 281654. Its totient is φ = 281652.

The previous prime is 281651. The next prime is 281663. The reversal of 281653 is 356182.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174724 + 106929 = 418^2 + 327^2 .

It is a cyclic number.

It is not a de Polignac number, because 281653 - 2¹ = 281651 is a prime.

Together with 281651, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 2¹⁰ + 8² + 6⁷ + 1 + 5⁴ + 3 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140826 + 140827.

It is an arithmetic number, because the mean of its divisors is an integer number (140827).

2²⁸¹⁶⁵³ is an apocalyptic number.

It is an amenable number.

281653 is a deficient number, since it is larger than the sum of its proper divisors (1).

281653 is an equidigital number, since it uses as much as digits as its factorization.

281653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 281653 is about 530.7099019238. The cubic root of 281653 is about 65.5498135139.

Subtracting 281653 from its reverse (356182), we obtain a square (74529 = 273²).

It can be divided in two parts, 28 and 1653, that added together give a square (1681 = 41²).

The spelling of 281653 in words is "two hundred eighty-one thousand, six hundred fifty-three".