394689323449 has 2 divisors, whose sum is σ = 394689323450. Its totient is φ = 394689323448.

The previous prime is 394689323447. The next prime is 394689323473. The reversal of 394689323449 is 944323986493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325478237049 + 69211086400 = 570507^2 + 263080^2 .

It is a cyclic number.

It is not a de Polignac number, because 394689323449 - 2¹ = 394689323447 is a prime.

Together with 394689323447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (394689323447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197344661724 + 197344661725.

It is an arithmetic number, because the mean of its divisors is an integer number (197344661725).

Almost surely, 2^394689323449 is an apocalyptic number.

It is an amenable number.

394689323449 is a deficient number, since it is larger than the sum of its proper divisors (1).

394689323449 is an equidigital number, since it uses as much as digits as its factorization.

394689323449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120932352, while the sum is 64.

The spelling of 394689323449 in words is "three hundred ninety-four billion, six hundred eighty-nine million, three hundred twenty-three thousand, four hundred forty-nine".