263580643 has 2 divisors, whose sum is σ = 263580644. Its totient is φ = 263580642.

The previous prime is 263580641. The next prime is 263580659. The reversal of 263580643 is 346085362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263580643 - 2¹ = 263580641 is a prime.

Together with 263580641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (263580641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131790321 + 131790322.

It is an arithmetic number, because the mean of its divisors is an integer number (131790322).

Almost surely, 2^263580643 is an apocalyptic number.

263580643 is a deficient number, since it is larger than the sum of its proper divisors (1).

263580643 is an equidigital number, since it uses as much as digits as its factorization.

263580643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 263580643 is about 16235.1668608610. The cubic root of 263580643 is about 641.1670137712.

The spelling of 263580643 in words is "two hundred sixty-three million, five hundred eighty thousand, six hundred forty-three".