109427 has 4 divisors (see below), whose sum is σ = 111000. Its totient is φ = 107856.

The previous prime is 109423. The next prime is 109433. The reversal of 109427 is 724901.

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 109427 - 2² = 109423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677 + ... + 822.

It is an arithmetic number, because the mean of its divisors is an integer number (27750).

2¹⁰⁹⁴²⁷ is an apocalyptic number.

109427 is a deficient number, since it is larger than the sum of its proper divisors (1573).

109427 is an equidigital number, since it uses as much as digits as its factorization.

109427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 109427 is about 330.7975211515. The cubic root of 109427 is about 47.8308572197.

The spelling of 109427 in words is "one hundred nine thousand, four hundred twenty-seven".