994181 has 2 divisors, whose sum is σ = 994182. Its totient is φ = 994180.

The previous prime is 994163. The next prime is 994183. The reversal of 994181 is 181499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 982081 + 12100 = 991^2 + 110^2 .

It is an emirp because it is prime and its reverse (181499) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-994181 is a prime.

It is a super-2 number, since 2×994181² = 1976791721522, which contains 22 as substring.

Together with 994183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497090 + 497091.

It is an arithmetic number, because the mean of its divisors is an integer number (497091).

2⁹⁹⁴¹⁸¹ is an apocalyptic number.

It is an amenable number.

994181 is a deficient number, since it is larger than the sum of its proper divisors (1).

994181 is an equidigital number, since it uses as much as digits as its factorization.

994181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 32.

The square root of 994181 is about 997.0862550452. The cubic root of 994181 is about 99.8056558816.

The spelling of 994181 in words is "nine hundred ninety-four thousand, one hundred eighty-one".