10439909 has 4 divisors (see below), whose sum is σ = 10466604. Its totient is φ = 10413216.

The previous prime is 10439857. The next prime is 10439917. The reversal of 10439909 is 90993401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5987809 + 4452100 = 2447^2 + 2110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10439909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10439939) 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, 12752 + ... + 13545.

It is an arithmetic number, because the mean of its divisors is an integer number (2616651).

Almost surely, 2^10439909 is an apocalyptic number.

It is an amenable number.

10439909 is a deficient number, since it is larger than the sum of its proper divisors (26695).

10439909 is an equidigital number, since it uses as much as digits as its factorization.

10439909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26694.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 10439909 is about 3231.0848023535. The cubic root of 10439909 is about 218.5574279106.

The spelling of 10439909 in words is "ten million, four hundred thirty-nine thousand, nine hundred nine".