863864523 has 6 divisors (see below), whose sum is σ = 1247804324. Its totient is φ = 575909676.

The previous prime is 863864479. The next prime is 863864549. The reversal of 863864523 is 325468368.

It is a happy number.

863864523 is a `hidden beast` number, since 8 + 63 + 8 + 64 + 523 = 666.

It is not a de Polignac number, because 863864523 - 2⁶ = 863864459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863864563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47992465 + ... + 47992482.

Almost surely, 2^863864523 is an apocalyptic number.

863864523 is a deficient number, since it is larger than the sum of its proper divisors (383939801).

863864523 is a wasteful number, since it uses less digits than its factorization.

863864523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95984953 (or 95984950 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 863864523 is about 29391.5723124844. The cubic root of 863864523 is about 952.3908470203.

It can be divided in two parts, 86386 and 4523, that added together give a palindrome (90909).

The spelling of 863864523 in words is "eight hundred sixty-three million, eight hundred sixty-four thousand, five hundred twenty-three".