121644317 has 2 divisors, whose sum is σ = 121644318. Its totient is φ = 121644316.

The previous prime is 121644311. The next prime is 121644337. The reversal of 121644317 is 713446121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121638841 + 5476 = 11029^2 + 74^2 .

It is a cyclic number.

It is not a de Polignac number, because 121644317 - 2⁴ = 121644301 is a prime.

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 121644317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121644311) 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, 60822158 + 60822159.

It is an arithmetic number, because the mean of its divisors is an integer number (60822159).

Almost surely, 2^121644317 is an apocalyptic number.

It is an amenable number.

121644317 is a deficient number, since it is larger than the sum of its proper divisors (1).

121644317 is an equidigital number, since it uses as much as digits as its factorization.

121644317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 121644317 is about 11029.2482518076. The cubic root of 121644317 is about 495.4851102512.

The spelling of 121644317 in words is "one hundred twenty-one million, six hundred forty-four thousand, three hundred seventeen".