194348729 has 2 divisors, whose sum is σ = 194348730. Its totient is φ = 194348728.

The previous prime is 194348717. The next prime is 194348731. The reversal of 194348729 is 927843491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170563600 + 23785129 = 13060^2 + 4877^2 .

It is an emirp because it is prime and its reverse (927843491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194348729 - 2²⁰ = 193300153 is a prime.

Together with 194348731, 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 (194348779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97174364 + 97174365.

It is an arithmetic number, because the mean of its divisors is an integer number (97174365).

Almost surely, 2^194348729 is an apocalyptic number.

It is an amenable number.

194348729 is a deficient number, since it is larger than the sum of its proper divisors (1).

194348729 is an equidigital number, since it uses as much as digits as its factorization.

194348729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 194348729 is about 13940.9012979793. The cubic root of 194348729 is about 579.2426987071.

The spelling of 194348729 in words is "one hundred ninety-four million, three hundred forty-eight thousand, seven hundred twenty-nine".