121869329 has 2 divisors, whose sum is σ = 121869330. Its totient is φ = 121869328.

The previous prime is 121869317. The next prime is 121869337. The reversal of 121869329 is 923968121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93566929 + 28302400 = 9673^2 + 5320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121869329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121869359) 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, 60934664 + 60934665.

It is an arithmetic number, because the mean of its divisors is an integer number (60934665).

Almost surely, 2^121869329 is an apocalyptic number.

It is an amenable number.

121869329 is a deficient number, since it is larger than the sum of its proper divisors (1).

121869329 is an equidigital number, since it uses as much as digits as its factorization.

121869329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 121869329 is about 11039.4442341995. Note that the first 3 decimals coincide. The cubic root of 121869329 is about 495.7904305102.

The spelling of 121869329 in words is "one hundred twenty-one million, eight hundred sixty-nine thousand, three hundred twenty-nine".