863881263 has 12 divisors (see below), whose sum is σ = 1426089808. Its totient is φ = 493646400.

The previous prime is 863881253. The next prime is 863881273. The reversal of 863881263 is 362188368.

863881263 is a `hidden beast` number, since 8 + 6 + 388 + 1 + 263 = 666.

It is an interprime number because it is at equal distance from previous prime (863881253) and next prime (863881273).

It is not a de Polignac number, because 863881263 - 2⁶ = 863881199 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 (863881253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6856138 + ... + 6856263.

Almost surely, 2^863881263 is an apocalyptic number.

863881263 is a deficient number, since it is larger than the sum of its proper divisors (562208545).

863881263 is a wasteful number, since it uses less digits than its factorization.

863881263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13712414 (or 13712411 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 863881263 is about 29391.8570866150. The cubic root of 863881263 is about 952.3969988028.

The spelling of 863881263 in words is "eight hundred sixty-three million, eight hundred eighty-one thousand, two hundred sixty-three".