863109 has 16 divisors (see below), whose sum is σ = 1377600. Its totient is φ = 530928.

The previous prime is 863087. The next prime is 863119. The reversal of 863109 is 901368.

863109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 863109 - 2¹⁵ = 830341 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879 + ... + 1580.

It is an arithmetic number, because the mean of its divisors is an integer number (86100).

2⁸⁶³¹⁰⁹ is an apocalyptic number.

It is an amenable number.

863109 is a deficient number, since it is larger than the sum of its proper divisors (514491).

863109 is a wasteful number, since it uses less digits than its factorization.

863109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481 (or 2475 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 863109 is about 929.0365977721. The cubic root of 863109 is about 95.2113117105.

The spelling of 863109 in words is "eight hundred sixty-three thousand, one hundred nine".