7126009609 has 2 divisors, whose sum is σ = 7126009610. Its totient is φ = 7126009608.

The previous prime is 7126009591. The next prime is 7126009613. The reversal of 7126009609 is 9069006217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5387119609 + 1738890000 = 73397^2 + 41700^2 .

It is an emirp because it is prime and its reverse (9069006217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7126009609 - 2⁹ = 7126009097 is a prime.

It is not a weakly prime, because it can be changed into another prime (7126009619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3563004804 + 3563004805.

It is an arithmetic number, because the mean of its divisors is an integer number (3563004805).

Almost surely, 2^7126009609 is an apocalyptic number.

It is an amenable number.

7126009609 is a deficient number, since it is larger than the sum of its proper divisors (1).

7126009609 is an equidigital number, since it uses as much as digits as its factorization.

7126009609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 7126009609 is about 84415.6952764117. The cubic root of 7126009609 is about 1924.3414497991.

The spelling of 7126009609 in words is "seven billion, one hundred twenty-six million, nine thousand, six hundred nine".