9719377949 has 2 divisors, whose sum is σ = 9719377950. Its totient is φ = 9719377948.

The previous prime is 9719377919. The next prime is 9719377963. The reversal of 9719377949 is 9497739179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9431905924 + 287472025 = 97118^2 + 16955^2 .

It is a cyclic number.

It is not a de Polignac number, because 9719377949 - 2²⁸ = 9450942493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9719377919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4859688974 + 4859688975.

It is an arithmetic number, because the mean of its divisors is an integer number (4859688975).

Almost surely, 2^9719377949 is an apocalyptic number.

It is an amenable number.

9719377949 is a deficient number, since it is larger than the sum of its proper divisors (1).

9719377949 is an equidigital number, since it uses as much as digits as its factorization.

9719377949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27005076, while the sum is 65.

The square root of 9719377949 is about 98586.9055655973. The cubic root of 9719377949 is about 2134.0904556110.

The spelling of 9719377949 in words is "nine billion, seven hundred nineteen million, three hundred seventy-seven thousand, nine hundred forty-nine".