967988999981 has 2 divisors, whose sum is σ = 967988999982. Its totient is φ = 967988999980.

The previous prime is 967988999909. The next prime is 967989000031. The reversal of 967988999981 is 189999889769.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620636718025 + 347352281956 = 787805^2 + 589366^2 .

It is an emirp because it is prime and its reverse (189999889769) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 967988999981 - 2¹⁰ = 967988998957 is a prime.

It is a super-2 number, since 2×967988999981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (967988999581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 483994499990 + 483994499991.

It is an arithmetic number, because the mean of its divisors is an integer number (483994499991).

Almost surely, 2^967988999981 is an apocalyptic number.

It is an amenable number.

967988999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

967988999981 is an equidigital number, since it uses as much as digits as its factorization.

967988999981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11428107264, while the sum is 92.

The spelling of 967988999981 in words is "nine hundred sixty-seven billion, nine hundred eighty-eight million, nine hundred ninety-nine thousand, nine hundred eighty-one".