9791999573 has 2 divisors, whose sum is σ = 9791999574. Its totient is φ = 9791999572.

The previous prime is 9791999561. The next prime is 9791999579. The reversal of 9791999573 is 3759991979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7712001124 + 2079998449 = 87818^2 + 45607^2 .

It is a cyclic number.

It is not a de Polignac number, because 9791999573 - 2¹⁶ = 9791934037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9791999579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4895999786 + 4895999787.

It is an arithmetic number, because the mean of its divisors is an integer number (4895999787).

Almost surely, 2^9791999573 is an apocalyptic number.

It is an amenable number.

9791999573 is a deficient number, since it is larger than the sum of its proper divisors (1).

9791999573 is an equidigital number, since it uses as much as digits as its factorization.

9791999573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43401015, while the sum is 68.

The square root of 9791999573 is about 98954.5328572673. The cubic root of 9791999573 is about 2139.3924653982.

The spelling of 9791999573 in words is "nine billion, seven hundred ninety-one million, nine hundred ninety-nine thousand, five hundred seventy-three".