117121617 has 6 divisors (see below), whose sum is σ = 169175682. Its totient is φ = 78081072.

The previous prime is 117121601. The next prime is 117121657. The reversal of 117121617 is 716121711.

It can be written as a sum of positive squares in only one way, i.e., 62346816 + 54774801 = 7896^2 + 7401^2 .

It is not a de Polignac number, because 117121617 - 2⁴ = 117121601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117121657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6506748 + ... + 6506765.

It is an arithmetic number, because the mean of its divisors is an integer number (28195947).

Almost surely, 2^117121617 is an apocalyptic number.

It is an amenable number.

117121617 is a deficient number, since it is larger than the sum of its proper divisors (52054065).

117121617 is a wasteful number, since it uses less digits than its factorization.

117121617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13013519 (or 13013516 counting only the distinct ones).

The product of its digits is 588, while the sum is 27.

The square root of 117121617 is about 10822.2741140668. The cubic root of 117121617 is about 489.2667319195.

The spelling of 117121617 in words is "one hundred seventeen million, one hundred twenty-one thousand, six hundred seventeen".