263249 has 4 divisors (see below), whose sum is σ = 300864. Its totient is φ = 225636.

The previous prime is 263239. The next prime is 263257. The reversal of 263249 is 942362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 263249 - 2¹⁶ = 197713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18797 + ... + 18810.

It is an arithmetic number, because the mean of its divisors is an integer number (75216).

2²⁶³²⁴⁹ is an apocalyptic number.

It is an amenable number.

263249 is a deficient number, since it is larger than the sum of its proper divisors (37615).

263249 is an equidigital number, since it uses as much as digits as its factorization.

263249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37614.

The product of its digits is 2592, while the sum is 26.

The square root of 263249 is about 513.0779667848. The cubic root of 263249 is about 64.0897990733.

It can be divided in two parts, 263 and 249, that added together give a 9-th power (512 = 2⁹).

The spelling of 263249 in words is "two hundred sixty-three thousand, two hundred forty-nine".