9125239709 has 8 divisors (see below), whose sum is σ = 9179489592. Its totient is φ = 9071032320.

The previous prime is 9125239703. The next prime is 9125239723. The reversal of 9125239709 is 9079325219.

It can be written as a sum of positive squares in 4 ways, for example, as 285103225 + 8840136484 = 16885^2 + 94022^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9125239709 - 2²⁰ = 9124191133 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 (9125239703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489137 + ... + 507449.

It is an arithmetic number, because the mean of its divisors is an integer number (1147436199).

Almost surely, 2^9125239709 is an apocalyptic number.

It is an amenable number.

9125239709 is a deficient number, since it is larger than the sum of its proper divisors (54249883).

9125239709 is a wasteful number, since it uses less digits than its factorization.

9125239709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21247.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 9125239709 is about 95526.1205587247. The cubic root of 9125239709 is about 2089.6878962079.

The spelling of 9125239709 in words is "nine billion, one hundred twenty-five million, two hundred thirty-nine thousand, seven hundred nine".