1197959988389 has 2 divisors, whose sum is σ = 1197959988390. Its totient is φ = 1197959988388.

The previous prime is 1197959988367. The next prime is 1197959988419. The reversal of 1197959988389 is 9838899597911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 673740547489 + 524219440900 = 820817^2 + 724030^2 .

It is a cyclic number.

It is not a de Polignac number, because 1197959988389 - 2²⁰ = 1197958939813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1197959988389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1197959988289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598979994194 + 598979994195.

It is an arithmetic number, because the mean of its divisors is an integer number (598979994195).

Almost surely, 2^{1197959988389} is an apocalyptic number.

It is an amenable number.

1197959988389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1197959988389 is an equidigital number, since it uses as much as digits as its factorization.

1197959988389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3174474240, while the sum is 86.

The spelling of 1197959988389 in words is "one trillion, one hundred ninety-seven billion, nine hundred fifty-nine million, nine hundred eighty-eight thousand, three hundred eighty-nine".