9729386550971 has 4 divisors (see below), whose sum is σ = 9730936563072. Its totient is φ = 9727836538872.

The previous prime is 9729386550931. The next prime is 9729386550977. The reversal of 9729386550971 is 1790556839279.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9729386550971 - 2⁶ = 9729386550907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9729386550895 and 9729386550904.

It is not an unprimeable number, because it can be changed into a prime (9729386550977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774996635 + ... + 775009188.

It is an arithmetic number, because the mean of its divisors is an integer number (2432734140768).

Almost surely, 2^{9729386550971} is an apocalyptic number.

9729386550971 is a deficient number, since it is larger than the sum of its proper divisors (1550012101).

9729386550971 is a wasteful number, since it uses less digits than its factorization.

9729386550971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550012100.

The product of its (nonzero) digits is 257191200, while the sum is 71.

The spelling of 9729386550971 in words is "nine trillion, seven hundred twenty-nine billion, three hundred eighty-six million, five hundred fifty thousand, nine hundred seventy-one".