263265403 has 4 divisors (see below), whose sum is σ = 264290040. Its totient is φ = 262240768.

The previous prime is 263265371. The next prime is 263265427. The reversal of 263265403 is 304562362.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 263265403 - 2⁵ = 263265371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263262403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511933 + ... + 512446.

It is an arithmetic number, because the mean of its divisors is an integer number (66072510).

Almost surely, 2^263265403 is an apocalyptic number.

263265403 is a deficient number, since it is larger than the sum of its proper divisors (1024637).

263265403 is a wasteful number, since it uses less digits than its factorization.

263265403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024636.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 263265403 is about 16225.4554019294. The cubic root of 263265403 is about 640.9113018707.

The spelling of 263265403 in words is "two hundred sixty-three million, two hundred sixty-five thousand, four hundred three".