263245663 has 4 divisors (see below), whose sum is σ = 278730720. Its totient is φ = 247760608.

The previous prime is 263245621. The next prime is 263245667. The reversal of 263245663 is 366542362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366542362 = 2 ⋅183271181.

It is a cyclic number.

It is not a de Polignac number, because 263245663 - 2¹⁷ = 263114591 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 (263245667) 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 3 ways as a sum of consecutive naturals, for example, 7742503 + ... + 7742536.

It is an arithmetic number, because the mean of its divisors is an integer number (69682680).

Almost surely, 2^263245663 is an apocalyptic number.

263245663 is a deficient number, since it is larger than the sum of its proper divisors (15485057).

263245663 is a wasteful number, since it uses less digits than its factorization.

263245663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15485056.

The product of its digits is 155520, while the sum is 37.

The square root of 263245663 is about 16224.8470871069. The cubic root of 263245663 is about 640.8952826683.

The spelling of 263245663 in words is "two hundred sixty-three million, two hundred forty-five thousand, six hundred sixty-three".