263 has 2 divisors, whose sum is σ = 264. Its totient is φ = 262.

The previous prime is 257. The next prime is 269. The reversal of 263 is 362.

Subtracting from 263 its sum of digits (11), we obtain a palindrome (252).

Adding to 263 its reverse (362), we get a 4-th power (625 = 5^{4}).

Subtracting 263 from its reverse (362), we obtain a palindrome (99).

It can be divided in two parts, 26 and 3, that multiplied together give a triangular number (78 = T_{12}).

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (257) and next prime (269).

It is a cyclic number.

It is not a de Polignac number, because 263 - 2^{6} = 199 is a prime.

It is a Chen prime.

It is equal to p_{56} and since 263 and 56 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 6, base 12, base 14 and base 15.

It is a nialpdrome in base 9.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131 + 132.

It is an arithmetic number, because the mean of its divisors is an integer number (132).

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

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

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

The product of its digits is 36, while the sum is 11.

The square root of 263 is about 16.2172747402. The cubic root of 263 is about 6.4069585772.

The spelling of 263 in words is "two hundred sixty-three", and thus it is an aban number.

• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.063 sec. • engine limits •