121746689 has 2 divisors, whose sum is σ = 121746690. Its totient is φ = 121746688.

The previous prime is 121746679. The next prime is 121746697. The reversal of 121746689 is 986647121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121727089 + 19600 = 11033^2 + 140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121746689 is a prime.

It is not a weakly prime, because it can be changed into another prime (121746629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60873344 + 60873345.

It is an arithmetic number, because the mean of its divisors is an integer number (60873345).

Almost surely, 2^121746689 is an apocalyptic number.

It is an amenable number.

121746689 is a deficient number, since it is larger than the sum of its proper divisors (1).

121746689 is an equidigital number, since it uses as much as digits as its factorization.

121746689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 121746689 is about 11033.8882086053. Note that the first 3 decimals coincide. The cubic root of 121746689 is about 495.6240661307.

The spelling of 121746689 in words is "one hundred twenty-one million, seven hundred forty-six thousand, six hundred eighty-nine".