863995 has 16 divisors (see below), whose sum is σ = 1181952. Its totient is φ = 600160.

The previous prime is 863983. The next prime is 864007. The reversal of 863995 is 599368.

It is an interprime number because it is at equal distance from previous prime (863983) and next prime (864007).

It is not a de Polignac number, because 863995 - 2⁷ = 863867 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924 + ... + 1606.

It is an arithmetic number, because the mean of its divisors is an integer number (73872).

2⁸⁶³⁹⁹⁵ is an apocalyptic number.

863995 is a deficient number, since it is larger than the sum of its proper divisors (317957).

863995 is a wasteful number, since it uses less digits than its factorization.

863995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722.

The product of its digits is 58320, while the sum is 40.

The square root of 863995 is about 929.5133135141. The cubic root of 863995 is about 95.2438793908.

Subtracting from 863995 its sum of digits (40), we obtain a triangular number (863955 = T₁₃₁₄).

The spelling of 863995 in words is "eight hundred sixty-three thousand, nine hundred ninety-five".