121997417 has 2 divisors, whose sum is σ = 121997418. Its totient is φ = 121997416.

The previous prime is 121997387. The next prime is 121997437. The reversal of 121997417 is 714799121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103815721 + 18181696 = 10189^2 + 4264^2 .

It is a cyclic number.

It is not a de Polignac number, because 121997417 - 2⁶ = 121997353 is a prime.

It is a Chen prime.

It is equal to p_6948905 and since 121997417 and 6948905 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 (121997437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60998708 + 60998709.

It is an arithmetic number, because the mean of its divisors is an integer number (60998709).

Almost surely, 2^121997417 is an apocalyptic number.

It is an amenable number.

121997417 is a deficient number, since it is larger than the sum of its proper divisors (1).

121997417 is an equidigital number, since it uses as much as digits as its factorization.

121997417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 41.

The square root of 121997417 is about 11045.2440896523. The cubic root of 121997417 is about 495.9640661294.

The spelling of 121997417 in words is "one hundred twenty-one million, nine hundred ninety-seven thousand, four hundred seventeen".