9936977909 has 2 divisors, whose sum is σ = 9936977910. Its totient is φ = 9936977908.

The previous prime is 9936977899. The next prime is 9936977917. The reversal of 9936977909 is 9097796399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7255291684 + 2681686225 = 85178^2 + 51785^2 .

It is a cyclic number.

It is not a de Polignac number, because 9936977909 - 2¹⁶ = 9936912373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9936977959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4968488954 + 4968488955.

It is an arithmetic number, because the mean of its divisors is an integer number (4968488955).

Almost surely, 2^9936977909 is an apocalyptic number.

It is an amenable number.

9936977909 is a deficient number, since it is larger than the sum of its proper divisors (1).

9936977909 is an equidigital number, since it uses as much as digits as its factorization.

9936977909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52081218, while the sum is 68.

The square root of 9936977909 is about 99684.3915013780. The cubic root of 9936977909 is about 2149.8992495785.

The spelling of 9936977909 in words is "nine billion, nine hundred thirty-six million, nine hundred seventy-seven thousand, nine hundred nine".