863438017 has 8 divisors (see below), whose sum is σ = 933478056. Its totient is φ = 793915392.

The previous prime is 863438003. The next prime is 863438077. The reversal of 863438017 is 710834368.

It can be written as a sum of positive squares in 4 ways, for example, as 464876721 + 398561296 = 21561^2 + 19964^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 863438017 - 2⁷ = 863437889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863438077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125878 + ... + 132559.

It is an arithmetic number, because the mean of its divisors is an integer number (116684757).

Almost surely, 2^863438017 is an apocalyptic number.

It is an amenable number.

863438017 is a deficient number, since it is larger than the sum of its proper divisors (70040039).

863438017 is a wasteful number, since it uses less digits than its factorization.

863438017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258707.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 863438017 is about 29384.3158334510. The cubic root of 863438017 is about 952.2340835203.

The spelling of 863438017 in words is "eight hundred sixty-three million, four hundred thirty-eight thousand, seventeen".