9577920809 has 2 divisors, whose sum is σ = 9577920810. Its totient is φ = 9577920808.

The previous prime is 9577920791. The next prime is 9577920839. The reversal of 9577920809 is 9080297759.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5155670809 + 4422250000 = 71803^2 + 66500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9577920809 is a prime.

It is not a weakly prime, because it can be changed into another prime (9577920839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4788960404 + 4788960405.

It is an arithmetic number, because the mean of its divisors is an integer number (4788960405).

Almost surely, 2^9577920809 is an apocalyptic number.

It is an amenable number.

9577920809 is a deficient number, since it is larger than the sum of its proper divisors (1).

9577920809 is an equidigital number, since it uses as much as digits as its factorization.

9577920809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The square root of 9577920809 is about 97866.8524527074. The cubic root of 9577920809 is about 2123.6865375388.

The spelling of 9577920809 in words is "nine billion, five hundred seventy-seven million, nine hundred twenty thousand, eight hundred nine".