494229181 has 2 divisors, whose sum is σ = 494229182. Its totient is φ = 494229180.

The previous prime is 494229173. The next prime is 494229251. The reversal of 494229181 is 181922494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485497156 + 8732025 = 22034^2 + 2955^2 .

It is a cyclic number.

It is not a de Polignac number, because 494229181 - 2³ = 494229173 is a prime.

It is a super-3 number, since 3×494229181³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494229101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247114590 + 247114591.

It is an arithmetic number, because the mean of its divisors is an integer number (247114591).

Almost surely, 2^494229181 is an apocalyptic number.

It is an amenable number.

494229181 is a deficient number, since it is larger than the sum of its proper divisors (1).

494229181 is an equidigital number, since it uses as much as digits as its factorization.

494229181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The square root of 494229181 is about 22231.2658434017. The cubic root of 494229181 is about 790.6351677592.

The spelling of 494229181 in words is "four hundred ninety-four million, two hundred twenty-nine thousand, one hundred eighty-one".