109863 has 16 divisors (see below), whose sum is σ = 175840. Its totient is φ = 67392.

The previous prime is 109859. The next prime is 109873. The reversal of 109863 is 368901.

It is not a de Polignac number, because 109863 - 2² = 109859 is a prime.

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

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109843) 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, 195 + ... + 507.

It is an arithmetic number, because the mean of its divisors is an integer number (10990).

2¹⁰⁹⁸⁶³ is an apocalyptic number.

109863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

109863 is a deficient number, since it is larger than the sum of its proper divisors (65977).

109863 is a wasteful number, since it uses less digits than its factorization.

109863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 329 counting only the distinct ones).

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

The square root of 109863 is about 331.4558794169. The cubic root of 109863 is about 47.8942986547.

The spelling of 109863 in words is "one hundred nine thousand, eight hundred sixty-three".