194120393 has 2 divisors, whose sum is σ = 194120394. Its totient is φ = 194120392.

The previous prime is 194120383. The next prime is 194120401. The reversal of 194120393 is 393021491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189420169 + 4700224 = 13763^2 + 2168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194120393 is a prime.

It is not a weakly prime, because it can be changed into another prime (194120383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97060196 + 97060197.

It is an arithmetic number, because the mean of its divisors is an integer number (97060197).

Almost surely, 2^194120393 is an apocalyptic number.

It is an amenable number.

194120393 is a deficient number, since it is larger than the sum of its proper divisors (1).

194120393 is an equidigital number, since it uses as much as digits as its factorization.

194120393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 194120393 is about 13932.7094637045. The cubic root of 194120393 is about 579.0157633547.

The spelling of 194120393 in words is "one hundred ninety-four million, one hundred twenty thousand, three hundred ninety-three".