394827641077 has 2 divisors, whose sum is σ = 394827641078. Its totient is φ = 394827641076.

The previous prime is 394827641051. The next prime is 394827641083. The reversal of 394827641077 is 770146728493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350992262916 + 43835378161 = 592446^2 + 209369^2 .

It is an emirp because it is prime and its reverse (770146728493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394827641077 - 2¹⁵ = 394827608309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394827641777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197413820538 + 197413820539.

It is an arithmetic number, because the mean of its divisors is an integer number (197413820539).

Almost surely, 2^394827641077 is an apocalyptic number.

It is an amenable number.

394827641077 is a deficient number, since it is larger than the sum of its proper divisors (1).

394827641077 is an equidigital number, since it uses as much as digits as its factorization.

394827641077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14224896, while the sum is 58.

The spelling of 394827641077 in words is "three hundred ninety-four billion, eight hundred twenty-seven million, six hundred forty-one thousand, seventy-seven".