121606717 has 8 divisors (see below), whose sum is σ = 122638680. Its totient is φ = 120578880.

The previous prime is 121606699. The next prime is 121606747. The reversal of 121606717 is 717606121.

It can be written as a sum of positive squares in 4 ways, for example, as 60047001 + 61559716 = 7749^2 + 7846^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121606717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121606747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87367 + ... + 88747.

It is an arithmetic number, because the mean of its divisors is an integer number (15329835).

Almost surely, 2^121606717 is an apocalyptic number.

It is an amenable number.

121606717 is a deficient number, since it is larger than the sum of its proper divisors (1031963).

121606717 is a wasteful number, since it uses less digits than its factorization.

121606717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 121606717 is about 11027.5435614646. The cubic root of 121606717 is about 495.4340538586.

The spelling of 121606717 in words is "one hundred twenty-one million, six hundred six thousand, seven hundred seventeen".