109447 has 4 divisors (see below), whose sum is σ = 117880. Its totient is φ = 101016.

The previous prime is 109441. The next prime is 109451. The reversal of 109447 is 744901.

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 109447 - 2¹⁵ = 76679 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109441) 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, 4197 + ... + 4222.

It is an arithmetic number, because the mean of its divisors is an integer number (29470).

2¹⁰⁹⁴⁴⁷ is an apocalyptic number.

109447 is a deficient number, since it is larger than the sum of its proper divisors (8433).

109447 is an equidigital number, since it uses as much as digits as its factorization.

109447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8432.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 109447 is about 330.8277497430. The cubic root of 109447 is about 47.8337710614.

The spelling of 109447 in words is "one hundred nine thousand, four hundred forty-seven".