9968555731 has 2 divisors, whose sum is σ = 9968555732. Its totient is φ = 9968555730.

The previous prime is 9968555683. The next prime is 9968555743. The reversal of 9968555731 is 1375558699.

It is a strong prime.

It is an emirp because it is prime and its reverse (1375558699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9968555731 - 2¹⁷ = 9968424659 is a prime.

It is a super-2 number, since 2×9968555731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9968555771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4984277865 + 4984277866.

It is an arithmetic number, because the mean of its divisors is an integer number (4984277866).

Almost surely, 2^9968555731 is an apocalyptic number.

9968555731 is a deficient number, since it is larger than the sum of its proper divisors (1).

9968555731 is an equidigital number, since it uses as much as digits as its factorization.

9968555731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206000, while the sum is 58.

The square root of 9968555731 is about 99842.6548675465. The cubic root of 9968555731 is about 2152.1741648904.

The spelling of 9968555731 in words is "nine billion, nine hundred sixty-eight million, five hundred fifty-five thousand, seven hundred thirty-one".