121902329 has 2 divisors, whose sum is σ = 121902330. Its totient is φ = 121902328.

The previous prime is 121902311. The next prime is 121902331. The reversal of 121902329 is 923209121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87703225 + 34199104 = 9365^2 + 5848^2 .

It is a cyclic number.

It is not a de Polignac number, because 121902329 - 2⁸ = 121902073 is a prime.

Together with 121902331, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121902029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60951164 + 60951165.

It is an arithmetic number, because the mean of its divisors is an integer number (60951165).

Almost surely, 2^121902329 is an apocalyptic number.

It is an amenable number.

121902329 is a deficient number, since it is larger than the sum of its proper divisors (1).

121902329 is an equidigital number, since it uses as much as digits as its factorization.

121902329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 121902329 is about 11040.9387734920. The cubic root of 121902329 is about 495.8351768184.

The spelling of 121902329 in words is "one hundred twenty-one million, nine hundred two thousand, three hundred twenty-nine".