117965189 has 2 divisors, whose sum is σ = 117965190. Its totient is φ = 117965188.

The previous prime is 117965173. The next prime is 117965203. The reversal of 117965189 is 981569711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64529089 + 53436100 = 8033^2 + 7310^2 .

It is a cyclic number.

It is not a de Polignac number, because 117965189 - 2⁴ = 117965173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117965119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58982594 + 58982595.

It is an arithmetic number, because the mean of its divisors is an integer number (58982595).

Almost surely, 2^117965189 is an apocalyptic number.

It is an amenable number.

117965189 is a deficient number, since it is larger than the sum of its proper divisors (1).

117965189 is an equidigital number, since it uses as much as digits as its factorization.

117965189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 47.

The square root of 117965189 is about 10861.1780668581. The cubic root of 117965189 is about 490.4385758198.

The spelling of 117965189 in words is "one hundred seventeen million, nine hundred sixty-five thousand, one hundred eighty-nine".