1172912899289 has 2 divisors, whose sum is σ = 1172912899290. Its totient is φ = 1172912899288.

The previous prime is 1172912899261. The next prime is 1172912899357. The reversal of 1172912899289 is 9829982192711.

It is an a-pointer prime, because the next prime (1172912899357) can be obtained adding 1172912899289 to its sum of digits (68).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113727740889 + 59185158400 = 1055333^2 + 243280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1172912899289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1172912899889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586456449644 + 586456449645.

It is an arithmetic number, because the mean of its divisors is an integer number (586456449645).

Almost surely, 2^{1172912899289} is an apocalyptic number.

It is an amenable number.

1172912899289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172912899289 is an equidigital number, since it uses as much as digits as its factorization.

1172912899289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 68.

The spelling of 1172912899289 in words is "one trillion, one hundred seventy-two billion, nine hundred twelve million, eight hundred ninety-nine thousand, two hundred eighty-nine".