121967717 has 2 divisors, whose sum is σ = 121967718. Its totient is φ = 121967716.

The previous prime is 121967711. The next prime is 121967761. The reversal of 121967717 is 717769121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91508356 + 30459361 = 9566^2 + 5519^2 .

It is a cyclic number.

It is not a de Polignac number, because 121967717 - 2⁶ = 121967653 is a prime.

It is a super-2 number, since 2×121967717² = 29752247980384178, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121967711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60983858 + 60983859.

It is an arithmetic number, because the mean of its divisors is an integer number (60983859).

Almost surely, 2^121967717 is an apocalyptic number.

It is an amenable number.

121967717 is a deficient number, since it is larger than the sum of its proper divisors (1).

121967717 is an equidigital number, since it uses as much as digits as its factorization.

121967717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37044, while the sum is 41.

The square root of 121967717 is about 11043.8995377539. The cubic root of 121967717 is about 495.9238157464.

The spelling of 121967717 in words is "one hundred twenty-one million, nine hundred sixty-seven thousand, seven hundred seventeen".