263032643 has 4 divisors (see below), whose sum is σ = 265491000. Its totient is φ = 260574288.

The previous prime is 263032631. The next prime is 263032663. The reversal of 263032643 is 346230362.

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 263032643 - 2²⁰ = 261984067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263032603) 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, 1229018 + ... + 1229231.

It is an arithmetic number, because the mean of its divisors is an integer number (66372750).

Almost surely, 2^263032643 is an apocalyptic number.

263032643 is a deficient number, since it is larger than the sum of its proper divisors (2458357).

263032643 is a wasteful number, since it uses less digits than its factorization.

263032643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458356.

The product of its (nonzero) digits is 15552, while the sum is 29.

The square root of 263032643 is about 16218.2811358047. The cubic root of 263032643 is about 640.7223638905.

The spelling of 263032643 in words is "two hundred sixty-three million, thirty-two thousand, six hundred forty-three".