263535983 has 2 divisors, whose sum is σ = 263535984. Its totient is φ = 263535982.

The previous prime is 263535977. The next prime is 263536019. The reversal of 263535983 is 389535362.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263535983 - 2⁶ = 263535919 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263535953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131767991 + 131767992.

It is an arithmetic number, because the mean of its divisors is an integer number (131767992).

Almost surely, 2^263535983 is an apocalyptic number.

263535983 is a deficient number, since it is larger than the sum of its proper divisors (1).

263535983 is an equidigital number, since it uses as much as digits as its factorization.

263535983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 44.

The square root of 263535983 is about 16233.7913932636. The cubic root of 263535983 is about 641.1307995081.

The spelling of 263535983 in words is "two hundred sixty-three million, five hundred thirty-five thousand, nine hundred eighty-three".