2109239 has 4 divisors (see below), whose sum is σ = 2301000. Its totient is φ = 1917480.

The previous prime is 2109223. The next prime is 2109253. The reversal of 2109239 is 9329012.

2109239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2109239 - 2⁴ = 2109223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109269) 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, 95864 + ... + 95885.

It is an arithmetic number, because the mean of its divisors is an integer number (575250).

2^2109239 is an apocalyptic number.

2109239 is a deficient number, since it is larger than the sum of its proper divisors (191761).

2109239 is a wasteful number, since it uses less digits than its factorization.

2109239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191760.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 2109239 is about 1452.3219340077. The cubic root of 2109239 is about 128.2454397136.

It can be divided in two parts, 210 and 9239, that added together give a palindrome (9449).

The spelling of 2109239 in words is "two million, one hundred nine thousand, two hundred thirty-nine".