121707617 has 2 divisors, whose sum is σ = 121707618. Its totient is φ = 121707616.

The previous prime is 121707613. The next prime is 121707623. The reversal of 121707617 is 716707121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82156096 + 39551521 = 9064^2 + 6289^2 .

It is a cyclic number.

It is not a de Polignac number, because 121707617 - 2² = 121707613 is a prime.

It is a super-3 number, since 3×121707617³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121707611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60853808 + 60853809.

It is an arithmetic number, because the mean of its divisors is an integer number (60853809).

Almost surely, 2^121707617 is an apocalyptic number.

It is an amenable number.

121707617 is a deficient number, since it is larger than the sum of its proper divisors (1).

121707617 is an equidigital number, since it uses as much as digits as its factorization.

121707617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4116, while the sum is 32.

The square root of 121707617 is about 11032.1175211289. The cubic root of 121707617 is about 495.5710404711.

The spelling of 121707617 in words is "one hundred twenty-one million, seven hundred seven thousand, six hundred seventeen".