117185869 has 2 divisors, whose sum is σ = 117185870. Its totient is φ = 117185868.

The previous prime is 117185867. The next prime is 117185917. The reversal of 117185869 is 968581711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113145769 + 4040100 = 10637^2 + 2010^2 .

It is an emirp because it is prime and its reverse (968581711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117185869 - 2¹ = 117185867 is a prime.

It is a super-2 number, since 2×117185869² = 27465055786570322, which contains 22 as substring.

Together with 117185867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117185867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58592934 + 58592935.

It is an arithmetic number, because the mean of its divisors is an integer number (58592935).

Almost surely, 2^117185869 is an apocalyptic number.

It is an amenable number.

117185869 is a deficient number, since it is larger than the sum of its proper divisors (1).

117185869 is an equidigital number, since it uses as much as digits as its factorization.

117185869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 46.

The square root of 117185869 is about 10825.2422143802. The cubic root of 117185869 is about 489.3561848603.

The spelling of 117185869 in words is "one hundred seventeen million, one hundred eighty-five thousand, eight hundred sixty-nine".