121766089 has 2 divisors, whose sum is σ = 121766090. Its totient is φ = 121766088.

The previous prime is 121766083. The next prime is 121766093. The reversal of 121766089 is 980667121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68227600 + 53538489 = 8260^2 + 7317^2 .

It is a cyclic number.

It is not a de Polignac number, because 121766089 - 2¹⁵ = 121733321 is a prime.

It is a Chen prime.

It is equal to p_6936484 and since 121766089 and 6936484 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (121766083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60883044 + 60883045.

It is an arithmetic number, because the mean of its divisors is an integer number (60883045).

Almost surely, 2^121766089 is an apocalyptic number.

It is an amenable number.

121766089 is a deficient number, since it is larger than the sum of its proper divisors (1).

121766089 is an equidigital number, since it uses as much as digits as its factorization.

121766089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 121766089 is about 11034.7672834546. The cubic root of 121766089 is about 495.6503901764.

The spelling of 121766089 in words is "one hundred twenty-one million, seven hundred sixty-six thousand, eighty-nine".