163708253 has 2 divisors, whose sum is σ = 163708254. Its totient is φ = 163708252.

The previous prime is 163708243. The next prime is 163708327. The reversal of 163708253 is 352807361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87198244 + 76510009 = 9338^2 + 8747^2 .

It is an emirp because it is prime and its reverse (352807361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163708253 - 2⁶ = 163708189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163708213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81854126 + 81854127.

It is an arithmetic number, because the mean of its divisors is an integer number (81854127).

Almost surely, 2^163708253 is an apocalyptic number.

It is an amenable number.

163708253 is a deficient number, since it is larger than the sum of its proper divisors (1).

163708253 is an equidigital number, since it uses as much as digits as its factorization.

163708253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 163708253 is about 12794.8525978223. The cubic root of 163708253 is about 547.0455942040.

The spelling of 163708253 in words is "one hundred sixty-three million, seven hundred eight thousand, two hundred fifty-three".