194435221 has 2 divisors, whose sum is σ = 194435222. Its totient is φ = 194435220.

The previous prime is 194435203. The next prime is 194435233. The reversal of 194435221 is 122534491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103022500 + 91412721 = 10150^2 + 9561^2 .

It is a cyclic number.

It is not a de Polignac number, because 194435221 - 2¹³ = 194427029 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194435291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97217610 + 97217611.

It is an arithmetic number, because the mean of its divisors is an integer number (97217611).

Almost surely, 2^194435221 is an apocalyptic number.

It is an amenable number.

194435221 is a deficient number, since it is larger than the sum of its proper divisors (1).

194435221 is an equidigital number, since it uses as much as digits as its factorization.

194435221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 194435221 is about 13944.0030479056. The cubic root of 194435221 is about 579.3286137347.

The spelling of 194435221 in words is "one hundred ninety-four million, four hundred thirty-five thousand, two hundred twenty-one".