117888517 has 2 divisors, whose sum is σ = 117888518. Its totient is φ = 117888516.

The previous prime is 117888497. The next prime is 117888527. The reversal of 117888517 is 715888711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113763556 + 4124961 = 10666^2 + 2031^2 .

It is a cyclic number.

It is not a de Polignac number, because 117888517 - 2¹⁹ = 117364229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117888527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58944258 + 58944259.

It is an arithmetic number, because the mean of its divisors is an integer number (58944259).

Almost surely, 2^117888517 is an apocalyptic number.

It is an amenable number.

117888517 is a deficient number, since it is larger than the sum of its proper divisors (1).

117888517 is an equidigital number, since it uses as much as digits as its factorization.

117888517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125440, while the sum is 46.

The square root of 117888517 is about 10857.6478576163. The cubic root of 117888517 is about 490.3322985457.

The spelling of 117888517 in words is "one hundred seventeen million, eight hundred eighty-eight thousand, five hundred seventeen".