263880257 has 4 divisors (see below), whose sum is σ = 263916480. Its totient is φ = 263844036.

The previous prime is 263880247. The next prime is 263880259. The reversal of 263880257 is 752088362.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263880257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263880259) 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, 2957 + ... + 23162.

It is an arithmetic number, because the mean of its divisors is an integer number (65979120).

Almost surely, 2^263880257 is an apocalyptic number.

It is an amenable number.

263880257 is a deficient number, since it is larger than the sum of its proper divisors (36223).

263880257 is a wasteful number, since it uses less digits than its factorization.

263880257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36222.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 263880257 is about 16244.3915552415. The cubic root of 263880257 is about 641.4098614872.

The spelling of 263880257 in words is "two hundred sixty-three million, eight hundred eighty thousand, two hundred fifty-seven".