208117153 has 2 divisors, whose sum is σ = 208117154. Its totient is φ = 208117152.

The previous prime is 208117139. The next prime is 208117163. The reversal of 208117153 is 351711802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172738449 + 35378704 = 13143^2 + 5948^2 .

It is a cyclic number.

It is not a de Polignac number, because 208117153 - 2⁵ = 208117121 is a prime.

It is not a weakly prime, because it can be changed into another prime (208117103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104058576 + 104058577.

It is an arithmetic number, because the mean of its divisors is an integer number (104058577).

Almost surely, 2^208117153 is an apocalyptic number.

It is an amenable number.

208117153 is a deficient number, since it is larger than the sum of its proper divisors (1).

208117153 is an equidigital number, since it uses as much as digits as its factorization.

208117153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 208117153 is about 14426.2660796202. The cubic root of 208117153 is about 592.6104316823.

Adding to 208117153 its reverse (351711802), we get a palindrome (559828955).

The spelling of 208117153 in words is "two hundred eight million, one hundred seventeen thousand, one hundred fifty-three".