263688047 has 4 divisors (see below), whose sum is σ = 301357776. Its totient is φ = 226018320.

The previous prime is 263687993. The next prime is 263688053. The reversal of 263688047 is 740886362.

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 263688047 - 2⁸ = 263687791 is a prime.

It is a super-2 number, since 2×263688047² = 139062772261348418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 263687989 and 263688007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263688647) 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, 18834854 + ... + 18834867.

It is an arithmetic number, because the mean of its divisors is an integer number (75339444).

Almost surely, 2^263688047 is an apocalyptic number.

263688047 is a deficient number, since it is larger than the sum of its proper divisors (37669729).

263688047 is an equidigital number, since it uses as much as digits as its factorization.

263688047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37669728.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 263688047 is about 16238.4742817791. The cubic root of 263688047 is about 641.2540896527.

The spelling of 263688047 in words is "two hundred sixty-three million, six hundred eighty-eight thousand, forty-seven".