263449 has 4 divisors (see below), whose sum is σ = 278964. Its totient is φ = 247936.

The previous prime is 263443. The next prime is 263489. The reversal of 263449 is 944362.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 235225 + 28224 = 485^2 + 168^2 .

It is a cyclic number.

It is not a de Polignac number, because 263449 - 2⁹ = 262937 is a prime.

It is a super-4 number, since 4×263449⁴ (a number of 23 digits) contains 4444 as substring.

It is a Duffinian number.

263449 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (263443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7732 + ... + 7765.

It is an arithmetic number, because the mean of its divisors is an integer number (69741).

263449 is a Friedman number, since it can be written as 9+6^4+4^3^2, using all its digits and the basic arithmetic operations.

2²⁶³⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

263449 is a deficient number, since it is larger than the sum of its proper divisors (15515).

263449 is a wasteful number, since it uses less digits than its factorization.

263449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15514.

The product of its digits is 5184, while the sum is 28.

The square root of 263449 is about 513.2728319325. The cubic root of 263449 is about 64.1060254281.

The spelling of 263449 in words is "two hundred sixty-three thousand, four hundred forty-nine".