394896145536089 has 2 divisors, whose sum is σ = 394896145536090. Its totient is φ = 394896145536088.

The previous prime is 394896145536019. The next prime is 394896145536097. The reversal of 394896145536089 is 980635541698493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264739192972864 + 130156952563225 = 16270808^2 + 11408635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394896145536089 is a prime.

It is not a weakly prime, because it can be changed into another prime (394896145536019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197448072768044 + 197448072768045.

It is an arithmetic number, because the mean of its divisors is an integer number (197448072768045).

Almost surely, 2^{394896145536089} is an apocalyptic number.

It is an amenable number.

394896145536089 is a deficient number, since it is larger than the sum of its proper divisors (1).

394896145536089 is an equidigital number, since it uses as much as digits as its factorization.

394896145536089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6046617600, while the sum is 80.

The spelling of 394896145536089 in words is "three hundred ninety-four trillion, eight hundred ninety-six billion, one hundred forty-five million, five hundred thirty-six thousand, eighty-nine".