263538113 has 4 divisors (see below), whose sum is σ = 277408560. Its totient is φ = 249667668.

The previous prime is 263538091. The next prime is 263538127. The reversal of 263538113 is 311835362.

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: 311835362 = 2 ⋅155917681.

It is a cyclic number.

It is not a de Polignac number, because 263538113 - 2⁶ = 263538049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 263538113.

It is not an unprimeable number, because it can be changed into a prime (263538133) 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, 6935195 + ... + 6935232.

It is an arithmetic number, because the mean of its divisors is an integer number (69352140).

Almost surely, 2^263538113 is an apocalyptic number.

It is an amenable number.

263538113 is a deficient number, since it is larger than the sum of its proper divisors (13870447).

263538113 is a wasteful number, since it uses less digits than its factorization.

263538113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13870446.

The product of its digits is 12960, while the sum is 32.

The square root of 263538113 is about 16233.8569970294. The cubic root of 263538113 is about 641.1325267927.

The spelling of 263538113 in words is "two hundred sixty-three million, five hundred thirty-eight thousand, one hundred thirteen".