121636159 has 2 divisors, whose sum is σ = 121636160. Its totient is φ = 121636158.

The previous prime is 121636129. The next prime is 121636169. The reversal of 121636159 is 951636121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121636159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121636129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60818079 + 60818080.

It is an arithmetic number, because the mean of its divisors is an integer number (60818080).

Almost surely, 2^121636159 is an apocalyptic number.

121636159 is a deficient number, since it is larger than the sum of its proper divisors (1).

121636159 is an equidigital number, since it uses as much as digits as its factorization.

121636159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 34.

The square root of 121636159 is about 11028.8784107905. The cubic root of 121636159 is about 495.4740335373.

The spelling of 121636159 in words is "one hundred twenty-one million, six hundred thirty-six thousand, one hundred fifty-nine".