194863393 has 2 divisors, whose sum is σ = 194863394. Its totient is φ = 194863392.

The previous prime is 194863391. The next prime is 194863399. The reversal of 194863393 is 393368491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113358609 + 81504784 = 10647^2 + 9028^2 .

It is a cyclic number.

It is not a de Polignac number, because 194863393 - 2¹ = 194863391 is a prime.

Together with 194863391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (194863391) 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, 97431696 + 97431697.

It is an arithmetic number, because the mean of its divisors is an integer number (97431697).

Almost surely, 2^194863393 is an apocalyptic number.

It is an amenable number.

194863393 is a deficient number, since it is larger than the sum of its proper divisors (1).

194863393 is an equidigital number, since it uses as much as digits as its factorization.

194863393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 46.

The square root of 194863393 is about 13959.3478715877. The cubic root of 194863393 is about 579.7535546329.

It can be divided in two parts, 1948 and 63393, that added together give a triangular number (65341 = T₃₆₁).

The spelling of 194863393 in words is "one hundred ninety-four million, eight hundred sixty-three thousand, three hundred ninety-three".