121789097 has 2 divisors, whose sum is σ = 121789098. Its totient is φ = 121789096.

The previous prime is 121789093. The next prime is 121789141. The reversal of 121789097 is 790987121.

It is an a-pointer prime, because the next prime (121789141) can be obtained adding 121789097 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83978896 + 37810201 = 9164^2 + 6149^2 .

It is a cyclic number.

It is not a de Polignac number, because 121789097 - 2² = 121789093 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121789093) 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, 60894548 + 60894549.

It is an arithmetic number, because the mean of its divisors is an integer number (60894549).

Almost surely, 2^121789097 is an apocalyptic number.

It is an amenable number.

121789097 is a deficient number, since it is larger than the sum of its proper divisors (1).

121789097 is an equidigital number, since it uses as much as digits as its factorization.

121789097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 44.

The square root of 121789097 is about 11035.8097573309. The cubic root of 121789097 is about 495.6816063277.

The spelling of 121789097 in words is "one hundred twenty-one million, seven hundred eighty-nine thousand, ninety-seven".