1189728617417 has 2 divisors, whose sum is σ = 1189728617418. Its totient is φ = 1189728617416.

The previous prime is 1189728617377. The next prime is 1189728617419. The reversal of 1189728617417 is 7147168279811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1061155455376 + 128573162041 = 1030124^2 + 358571^2 .

It is a cyclic number.

It is not a de Polignac number, because 1189728617417 - 2¹⁸ = 1189728355273 is a prime.

Together with 1189728617419, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1189728617417.

It is not a weakly prime, because it can be changed into another prime (1189728617419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594864308708 + 594864308709.

It is an arithmetic number, because the mean of its divisors is an integer number (594864308709).

Almost surely, 2^{1189728617417} is an apocalyptic number.

It is an amenable number.

1189728617417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189728617417 is an equidigital number, since it uses as much as digits as its factorization.

1189728617417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9483264, while the sum is 62.

The spelling of 1189728617417 in words is "one trillion, one hundred eighty-nine billion, seven hundred twenty-eight million, six hundred seventeen thousand, four hundred seventeen".