194294561 has 2 divisors, whose sum is σ = 194294562. Its totient is φ = 194294560.

The previous prime is 194294557. The next prime is 194294563. The reversal of 194294561 is 165492491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161163025 + 33131536 = 12695^2 + 5756^2 .

It is a cyclic number.

It is not a de Polignac number, because 194294561 - 2² = 194294557 is a prime.

Together with 194294563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194294563) 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, 97147280 + 97147281.

It is an arithmetic number, because the mean of its divisors is an integer number (97147281).

Almost surely, 2^194294561 is an apocalyptic number.

It is an amenable number.

194294561 is a deficient number, since it is larger than the sum of its proper divisors (1).

194294561 is an equidigital number, since it uses as much as digits as its factorization.

194294561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 194294561 is about 13938.9583900663. The cubic root of 194294561 is about 579.1888790703.

The spelling of 194294561 in words is "one hundred ninety-four million, two hundred ninety-four thousand, five hundred sixty-one".