263661063 has 4 divisors (see below), whose sum is σ = 351548088. Its totient is φ = 175774040.

The previous prime is 263661059. The next prime is 263661077. The reversal of 263661063 is 360166362.

It is a happy number.

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 263661063 - 2² = 263661059 is a prime.

It is a super-2 number, since 2×263661063² = 139034312284579938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263661053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43943508 + ... + 43943513.

It is an arithmetic number, because the mean of its divisors is an integer number (87887022).

Almost surely, 2^263661063 is an apocalyptic number.

263661063 is a deficient number, since it is larger than the sum of its proper divisors (87887025).

263661063 is an equidigital number, since it uses as much as digits as its factorization.

263661063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87887024.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 263661063 is about 16237.6433942860. The cubic root of 263661063 is about 641.2322150792.

The spelling of 263661063 in words is "two hundred sixty-three million, six hundred sixty-one thousand, sixty-three".