194813 has 2 divisors, whose sum is σ = 194814. Its totient is φ = 194812.

The previous prime is 194809. The next prime is 194819. The reversal of 194813 is 318491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190969 + 3844 = 437^2 + 62^2 .

It is a cyclic number.

It is not a de Polignac number, because 194813 - 2² = 194809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194819) 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, 97406 + 97407.

It is an arithmetic number, because the mean of its divisors is an integer number (97407).

2¹⁹⁴⁸¹³ is an apocalyptic number.

It is an amenable number.

194813 is a deficient number, since it is larger than the sum of its proper divisors (1).

194813 is an equidigital number, since it uses as much as digits as its factorization.

194813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 194813 is about 441.3762567244. The cubic root of 194813 is about 57.9703574252.

The spelling of 194813 in words is "one hundred ninety-four thousand, eight hundred thirteen".