9712726409 has 2 divisors, whose sum is σ = 9712726410. Its totient is φ = 9712726408.

The previous prime is 9712726357. The next prime is 9712726411. The reversal of 9712726409 is 9046272179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7009038400 + 2703688009 = 83720^2 + 51997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9712726409 is a prime.

Together with 9712726411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9712726459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4856363204 + 4856363205.

It is an arithmetic number, because the mean of its divisors is an integer number (4856363205).

Almost surely, 2^9712726409 is an apocalyptic number.

It is an amenable number.

9712726409 is a deficient number, since it is larger than the sum of its proper divisors (1).

9712726409 is an equidigital number, since it uses as much as digits as its factorization.

9712726409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 9712726409 is about 98553.1653931014. The cubic root of 9712726409 is about 2133.6035167866.

The spelling of 9712726409 in words is "nine billion, seven hundred twelve million, seven hundred twenty-six thousand, four hundred nine".