194120261 has 2 divisors, whose sum is σ = 194120262. Its totient is φ = 194120260.

The previous prime is 194120249. The next prime is 194120273. The reversal of 194120261 is 162021491.

It is a balanced prime because it is at equal distance from previous prime (194120249) and next prime (194120273).

It can be written as a sum of positive squares in only one way, i.e., 182763361 + 11356900 = 13519^2 + 3370^2 .

It is a cyclic number.

It is not a de Polignac number, because 194120261 - 2⁶ = 194120197 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194120261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194120231) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97060130 + 97060131.

It is an arithmetic number, because the mean of its divisors is an integer number (97060131).

Almost surely, 2^194120261 is an apocalyptic number.

It is an amenable number.

194120261 is a deficient number, since it is larger than the sum of its proper divisors (1).

194120261 is an equidigital number, since it uses as much as digits as its factorization.

194120261 is an odious number, because the sum of its binary digits is odd.

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

The square root of 194120261 is about 13932.7047266495. The cubic root of 194120261 is about 579.0156321130.

The spelling of 194120261 in words is "one hundred ninety-four million, one hundred twenty thousand, two hundred sixty-one".