263917253 has 4 divisors (see below), whose sum is σ = 264060480. Its totient is φ = 263774028.

The previous prime is 263917243. The next prime is 263917259. The reversal of 263917253 is 352719362.

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 263917253 - 2⁸ = 263916997 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 (263917259) 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, 68813 + ... + 72546.

It is an arithmetic number, because the mean of its divisors is an integer number (66015120).

Almost surely, 2^263917253 is an apocalyptic number.

It is an amenable number.

263917253 is a deficient number, since it is larger than the sum of its proper divisors (143227).

263917253 is a wasteful number, since it uses less digits than its factorization.

263917253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143226.

The product of its digits is 68040, while the sum is 38.

The square root of 263917253 is about 16245.5302468094. The cubic root of 263917253 is about 641.4398352976.

The spelling of 263917253 in words is "two hundred sixty-three million, nine hundred seventeen thousand, two hundred fifty-three".