121917359 has 2 divisors, whose sum is σ = 121917360. Its totient is φ = 121917358.

The previous prime is 121917343. The next prime is 121917371. The reversal of 121917359 is 953719121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121917359 - 2⁴ = 121917343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121917329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60958679 + 60958680.

It is an arithmetic number, because the mean of its divisors is an integer number (60958680).

Almost surely, 2^121917359 is an apocalyptic number.

121917359 is a deficient number, since it is larger than the sum of its proper divisors (1).

121917359 is an equidigital number, since it uses as much as digits as its factorization.

121917359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 38.

The square root of 121917359 is about 11041.6194011567. The cubic root of 121917359 is about 495.8555540513.

The spelling of 121917359 in words is "one hundred twenty-one million, nine hundred seventeen thousand, three hundred fifty-nine".