12061617989 has 2 divisors, whose sum is σ = 12061617990. Its totient is φ = 12061617988.

The previous prime is 12061617947. The next prime is 12061618001. The reversal of 12061617989 is 98971616021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9812487364 + 2249130625 = 99058^2 + 47425^2 .

It is an emirp because it is prime and its reverse (98971616021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12061617989 - 2²⁰ = 12060569413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12061619989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6030808994 + 6030808995.

It is an arithmetic number, because the mean of its divisors is an integer number (6030808995).

Almost surely, 2^12061617989 is an apocalyptic number.

It is an amenable number.

12061617989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12061617989 is an equidigital number, since it uses as much as digits as its factorization.

12061617989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 12061617989 in words is "twelve billion, sixty-one million, six hundred seventeen thousand, nine hundred eighty-nine".