263256983 has 16 divisors (see below), whose sum is σ = 297747360. Its totient is φ = 230563200.

The previous prime is 263256977. The next prime is 263257021. The reversal of 263256983 is 389652362.

It is a cyclic number.

It is not a de Polignac number, because 263256983 - 2⁴ = 263256967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263256923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279293 + ... + 280233.

It is an arithmetic number, because the mean of its divisors is an integer number (18609210).

Almost surely, 2^263256983 is an apocalyptic number.

263256983 is a deficient number, since it is larger than the sum of its proper divisors (34490377).

263256983 is a wasteful number, since it uses less digits than its factorization.

263256983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858.

The product of its digits is 466560, while the sum is 44.

The square root of 263256983 is about 16225.1959310204. The cubic root of 263256983 is about 640.9044690565.

The spelling of 263256983 in words is "two hundred sixty-three million, two hundred fifty-six thousand, nine hundred eighty-three".