109399 has 4 divisors (see below), whose sum is σ = 112960. Its totient is φ = 105840.

The previous prime is 109397. The next prime is 109423. The reversal of 109399 is 993901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993901 = 911 ⋅1091.

It is a cyclic number.

It is not a de Polignac number, because 109399 - 2¹ = 109397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 3529 = 109399 / (1 + 0 + 9 + 3 + 9 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109391) 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, 1734 + ... + 1795.

It is an arithmetic number, because the mean of its divisors is an integer number (28240).

2¹⁰⁹³⁹⁹ is an apocalyptic number.

109399 is a deficient number, since it is larger than the sum of its proper divisors (3561).

109399 is an equidigital number, since it uses as much as digits as its factorization.

109399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 109399 is about 330.7551964822. The cubic root of 109399 is about 47.8267772448.

It can be divided in two parts, 10 and 9399, that added together give a square (9409 = 97²).

The spelling of 109399 in words is "one hundred nine thousand, three hundred ninety-nine".