168609253 has 2 divisors, whose sum is σ = 168609254. Its totient is φ = 168609252.

The previous prime is 168609223. The next prime is 168609289. The reversal of 168609253 is 352906861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89434849 + 79174404 = 9457^2 + 8898^2 .

It is a cyclic number.

It is not a de Polignac number, because 168609253 - 2¹⁷ = 168478181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168609223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84304626 + 84304627.

It is an arithmetic number, because the mean of its divisors is an integer number (84304627).

Almost surely, 2^168609253 is an apocalyptic number.

It is an amenable number.

168609253 is a deficient number, since it is larger than the sum of its proper divisors (1).

168609253 is an equidigital number, since it uses as much as digits as its factorization.

168609253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 168609253 is about 12984.9625721447. The cubic root of 168609253 is about 552.4510475796.

The spelling of 168609253 in words is "one hundred sixty-eight million, six hundred nine thousand, two hundred fifty-three".