194000861 has 2 divisors, whose sum is σ = 194000862. Its totient is φ = 194000860.

The previous prime is 194000839. The next prime is 194000881. The reversal of 194000861 is 168000491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162078361 + 31922500 = 12731^2 + 5650^2 .

It is a cyclic number.

It is not a de Polignac number, because 194000861 - 2¹⁴ = 193984477 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 (194000881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97000430 + 97000431.

It is an arithmetic number, because the mean of its divisors is an integer number (97000431).

Almost surely, 2^194000861 is an apocalyptic number.

It is an amenable number.

194000861 is a deficient number, since it is larger than the sum of its proper divisors (1).

194000861 is an equidigital number, since it uses as much as digits as its factorization.

194000861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 194000861 is about 13928.4191852486. The cubic root of 194000861 is about 578.8968936130.

The spelling of 194000861 in words is "one hundred ninety-four million, eight hundred sixty-one", and thus it is an aban number.