9949716389 has 2 divisors, whose sum is σ = 9949716390. Its totient is φ = 9949716388.

The previous prime is 9949716373. The next prime is 9949716407. The reversal of 9949716389 is 9836179499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9872012164 + 77704225 = 99358^2 + 8815^2 .

It is an emirp because it is prime and its reverse (9836179499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9949716389 - 2⁴ = 9949716373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9949716319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4974858194 + 4974858195.

It is an arithmetic number, because the mean of its divisors is an integer number (4974858195).

Almost surely, 2^9949716389 is an apocalyptic number.

It is an amenable number.

9949716389 is a deficient number, since it is larger than the sum of its proper divisors (1).

9949716389 is an equidigital number, since it uses as much as digits as its factorization.

9949716389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26453952, while the sum is 65.

The square root of 9949716389 is about 99748.2650926822. The cubic root of 9949716389 is about 2150.8175285795.

The spelling of 9949716389 in words is "nine billion, nine hundred forty-nine million, seven hundred sixteen thousand, three hundred eighty-nine".