117817853 has 2 divisors, whose sum is σ = 117817854. Its totient is φ = 117817852.

The previous prime is 117817831. The next prime is 117817859. The reversal of 117817853 is 358718711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71944324 + 45873529 = 8482^2 + 6773^2 .

It is a cyclic number.

It is not a de Polignac number, because 117817853 - 2¹⁸ = 117555709 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 117817853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117817859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58908926 + 58908927.

It is an arithmetic number, because the mean of its divisors is an integer number (58908927).

Almost surely, 2^117817853 is an apocalyptic number.

It is an amenable number.

117817853 is a deficient number, since it is larger than the sum of its proper divisors (1).

117817853 is an equidigital number, since it uses as much as digits as its factorization.

117817853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 41.

The square root of 117817853 is about 10854.3932580315. The cubic root of 117817853 is about 490.2343083209.

The spelling of 117817853 in words is "one hundred seventeen million, eight hundred seventeen thousand, eight hundred fifty-three".