121930717 has 2 divisors, whose sum is σ = 121930718. Its totient is φ = 121930716.

The previous prime is 121930709. The next prime is 121930727. The reversal of 121930717 is 717039121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121308196 + 622521 = 11014^2 + 789^2 .

It is a cyclic number.

It is not a de Polignac number, because 121930717 - 2³ = 121930709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121930727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60965358 + 60965359.

It is an arithmetic number, because the mean of its divisors is an integer number (60965359).

Almost surely, 2^121930717 is an apocalyptic number.

It is an amenable number.

121930717 is a deficient number, since it is larger than the sum of its proper divisors (1).

121930717 is an equidigital number, since it uses as much as digits as its factorization.

121930717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 121930717 is about 11042.2242777440. The cubic root of 121930717 is about 495.8736630301.

Adding to 121930717 its reverse (717039121), we get a palindrome (838969838).

The spelling of 121930717 in words is "one hundred twenty-one million, nine hundred thirty thousand, seven hundred seventeen".