121535189 has 2 divisors, whose sum is σ = 121535190. Its totient is φ = 121535188.

The previous prime is 121535177. The next prime is 121535203. The reversal of 121535189 is 981535121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66552964 + 54982225 = 8158^2 + 7415^2 .

It is a cyclic number.

It is not a de Polignac number, because 121535189 - 2¹⁶ = 121469653 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121535389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60767594 + 60767595.

It is an arithmetic number, because the mean of its divisors is an integer number (60767595).

Almost surely, 2^121535189 is an apocalyptic number.

It is an amenable number.

121535189 is a deficient number, since it is larger than the sum of its proper divisors (1).

121535189 is an equidigital number, since it uses as much as digits as its factorization.

121535189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 35.

The square root of 121535189 is about 11024.2999324220. The cubic root of 121535189 is about 495.3368981583.

The spelling of 121535189 in words is "one hundred twenty-one million, five hundred thirty-five thousand, one hundred eighty-nine".