109869 has 8 divisors (see below), whose sum is σ = 149472. Its totient is φ = 71760.

The previous prime is 109859. The next prime is 109873. The reversal of 109869 is 968901.

It is a happy number.

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

It is not a de Polignac number, because 109869 - 2⁷ = 109741 is a prime.

It is a super-2 number, since 2×109869² = 24142394322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109819) 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, 187 + ... + 504.

It is an arithmetic number, because the mean of its divisors is an integer number (18684).

2¹⁰⁹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

109869 is a deficient number, since it is larger than the sum of its proper divisors (39603).

109869 is an equidigital number, since it uses as much as digits as its factorization.

109869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 109869 is about 331.4649302717. The cubic root of 109869 is about 47.8951705302.

The spelling of 109869 in words is "one hundred nine thousand, eight hundred sixty-nine".