863687 has 4 divisors (see below), whose sum is σ = 942216. Its totient is φ = 785160.

The previous prime is 863671. The next prime is 863689. The reversal of 863687 is 786368.

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 863687 - 2⁴ = 863671 is a prime.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 863687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863689) 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, 39248 + ... + 39269.

It is an arithmetic number, because the mean of its divisors is an integer number (235554).

2⁸⁶³⁶⁸⁷ is an apocalyptic number.

863687 is a deficient number, since it is larger than the sum of its proper divisors (78529).

863687 is a wasteful number, since it uses less digits than its factorization.

863687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78528.

The product of its digits is 48384, while the sum is 38.

The square root of 863687 is about 929.3476206458. The cubic root of 863687 is about 95.2325604204.

It can be divided in two parts, 86 and 3687, that added together give a palindrome (3773).

The spelling of 863687 in words is "eight hundred sixty-three thousand, six hundred eighty-seven".