9991324753 has 2 divisors, whose sum is σ = 9991324754. Its totient is φ = 9991324752.

The previous prime is 9991324751. The next prime is 9991324757. The reversal of 9991324753 is 3574231999.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9977612544 + 13712209 = 99888^2 + 3703^2 .

It is a cyclic number.

It is not a de Polignac number, because 9991324753 - 2¹ = 9991324751 is a prime.

It is a super-2 number, since 2×9991324753² (a number of 21 digits) contains 22 as substring.

Together with 9991324751, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 9991324753.

It is not a weakly prime, because it can be changed into another prime (9991324751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995662376 + 4995662377.

It is an arithmetic number, because the mean of its divisors is an integer number (4995662377).

Almost surely, 2^9991324753 is an apocalyptic number.

It is an amenable number.

9991324753 is a deficient number, since it is larger than the sum of its proper divisors (1).

9991324753 is an equidigital number, since it uses as much as digits as its factorization.

9991324753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 52.

The square root of 9991324753 is about 99956.6143534284. The cubic root of 9991324753 is about 2153.8115013506.

The spelling of 9991324753 in words is "nine billion, nine hundred ninety-one million, three hundred twenty-four thousand, seven hundred fifty-three".