263684641 has 8 divisors (see below), whose sum is σ = 302796000. Its totient is φ = 227096640.

The previous prime is 263684623. The next prime is 263684647. The reversal of 263684641 is 146486362.

263684641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 263684641 - 2¹¹ = 263682593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 263684594 and 263684603.

It is not an unprimeable number, because it can be changed into a prime (263684647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630616 + ... + 631033.

It is an arithmetic number, because the mean of its divisors is an integer number (37849500).

Almost surely, 2^263684641 is an apocalyptic number.

It is an amenable number.

263684641 is a deficient number, since it is larger than the sum of its proper divisors (39111359).

263684641 is a wasteful number, since it uses less digits than its factorization.

263684641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261679.

The product of its digits is 165888, while the sum is 40.

The square root of 263684641 is about 16238.3694070556. The cubic root of 263684641 is about 641.2513286618.

The spelling of 263684641 in words is "two hundred sixty-three million, six hundred eighty-four thousand, six hundred forty-one".