194274136829 has 2 divisors, whose sum is σ = 194274136830. Its totient is φ = 194274136828.

The previous prime is 194274136789. The next prime is 194274136897. The reversal of 194274136829 is 928631472491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142710172900 + 51563963929 = 377770^2 + 227077^2 .

It is an emirp because it is prime and its reverse (928631472491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194274136829 - 2¹² = 194274132733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194274136129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97137068414 + 97137068415.

It is an arithmetic number, because the mean of its divisors is an integer number (97137068415).

Almost surely, 2^194274136829 is an apocalyptic number.

It is an amenable number.

194274136829 is a deficient number, since it is larger than the sum of its proper divisors (1).

194274136829 is an equidigital number, since it uses as much as digits as its factorization.

194274136829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 56.

The spelling of 194274136829 in words is "one hundred ninety-four billion, two hundred seventy-four million, one hundred thirty-six thousand, eight hundred twenty-nine".