121617773 has 2 divisors, whose sum is σ = 121617774. Its totient is φ = 121617772.

The previous prime is 121617763. The next prime is 121617787. The reversal of 121617773 is 377716121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93760489 + 27857284 = 9683^2 + 5278^2 .

It is a cyclic number.

It is not a de Polignac number, because 121617773 - 2⁴ = 121617757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121617763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60808886 + 60808887.

It is an arithmetic number, because the mean of its divisors is an integer number (60808887).

Almost surely, 2^121617773 is an apocalyptic number.

It is an amenable number.

121617773 is a deficient number, since it is larger than the sum of its proper divisors (1).

121617773 is an equidigital number, since it uses as much as digits as its factorization.

121617773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12348, while the sum is 35.

The square root of 121617773 is about 11028.0448403151. The cubic root of 121617773 is about 495.4490677028.

The spelling of 121617773 in words is "one hundred twenty-one million, six hundred seventeen thousand, seven hundred seventy-three".