109403 has 4 divisors (see below), whose sum is σ = 125040. Its totient is φ = 93768.

The previous prime is 109397. The next prime is 109423. The reversal of 109403 is 304901.

109403 = 122² + 123² + ... + 128².

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 109403 - 2⁴ = 109387 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, 7808 + ... + 7821.

It is an arithmetic number, because the mean of its divisors is an integer number (31260).

2¹⁰⁹⁴⁰³ is an apocalyptic number.

109403 is a deficient number, since it is larger than the sum of its proper divisors (15637).

109403 is an equidigital number, since it uses as much as digits as its factorization.

109403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15636.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 109403 is about 330.7612431951. The cubic root of 109403 is about 47.8273601410.

It can be divided in two parts, 109 and 403, that added together give a 9-th power (512 = 2⁹).

The spelling of 109403 in words is "one hundred nine thousand, four hundred three".