10239709 has 4 divisors (see below), whose sum is σ = 10489500. Its totient is φ = 9989920.

The previous prime is 10239679. The next prime is 10239731. The reversal of 10239709 is 90793201.

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 765625 + 9474084 = 875^2 + 3078^2 .

It is a cyclic number.

It is not a de Polignac number, because 10239709 - 2¹⁹ = 9715421 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 (10239739) 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, 124834 + ... + 124915.

It is an arithmetic number, because the mean of its divisors is an integer number (2622375).

Almost surely, 2^10239709 is an apocalyptic number.

It is an amenable number.

10239709 is a deficient number, since it is larger than the sum of its proper divisors (249791).

10239709 is an equidigital number, since it uses as much as digits as its factorization.

10239709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249790.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 10239709 is about 3199.9545309270. The cubic root of 10239709 is about 217.1513522885.

The spelling of 10239709 in words is "ten million, two hundred thirty-nine thousand, seven hundred nine".