263272813 has 4 divisors (see below), whose sum is σ = 263624128. Its totient is φ = 262921500.

The previous prime is 263272787. The next prime is 263272831. The reversal of 263272813 is 318272362.

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, and also an emirpimes, since its reverse is a distinct semiprime: 318272362 = 2 ⋅159136181.

It is a cyclic number.

It is not a de Polignac number, because 263272813 - 2⁹ = 263272301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263272843) 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, 174531 + ... + 176032.

It is an arithmetic number, because the mean of its divisors is an integer number (65906032).

Almost surely, 2^263272813 is an apocalyptic number.

It is an amenable number.

263272813 is a deficient number, since it is larger than the sum of its proper divisors (351315).

263272813 is an equidigital number, since it uses as much as digits as its factorization.

263272813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351314.

The product of its digits is 24192, while the sum is 34.

The square root of 263272813 is about 16225.6837452232. The cubic root of 263272813 is about 640.9173149512.

The spelling of 263272813 in words is "two hundred sixty-three million, two hundred seventy-two thousand, eight hundred thirteen".