394149326309 has 2 divisors, whose sum is σ = 394149326310. Its totient is φ = 394149326308.

The previous prime is 394149326299. The next prime is 394149326339. The reversal of 394149326309 is 903623941493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 301596475684 + 92552850625 = 549178^2 + 304225^2 .

It is a cyclic number.

It is not a de Polignac number, because 394149326309 - 2⁴ = 394149326293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394149326339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197074663154 + 197074663155.

It is an arithmetic number, because the mean of its divisors is an integer number (197074663155).

Almost surely, 2^394149326309 is an apocalyptic number.

It is an amenable number.

394149326309 is a deficient number, since it is larger than the sum of its proper divisors (1).

394149326309 is an equidigital number, since it uses as much as digits as its factorization.

394149326309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 53.

The spelling of 394149326309 in words is "three hundred ninety-four billion, one hundred forty-nine million, three hundred twenty-six thousand, three hundred nine".