194649838429 has 2 divisors, whose sum is σ = 194649838430. Its totient is φ = 194649838428.

The previous prime is 194649838367. The next prime is 194649838463. The reversal of 194649838429 is 924838946491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143813117529 + 50836720900 = 379227^2 + 225470^2 .

It is a cyclic number.

It is not a de Polignac number, because 194649838429 - 2¹³ = 194649830237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194649830429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97324919214 + 97324919215.

It is an arithmetic number, because the mean of its divisors is an integer number (97324919215).

Almost surely, 2^194649838429 is an apocalyptic number.

It is an amenable number.

194649838429 is a deficient number, since it is larger than the sum of its proper divisors (1).

194649838429 is an equidigital number, since it uses as much as digits as its factorization.

194649838429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107495424, while the sum is 67.

The spelling of 194649838429 in words is "one hundred ninety-four billion, six hundred forty-nine million, eight hundred thirty-eight thousand, four hundred twenty-nine".