394868077 has 2 divisors, whose sum is σ = 394868078. Its totient is φ = 394868076.

The previous prime is 394868063. The next prime is 394868081. The reversal of 394868077 is 770868493.

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., 237591396 + 157276681 = 15414^2 + 12541^2 .

It is a cyclic number.

It is not a de Polignac number, because 394868077 - 2¹¹ = 394866029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394868017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197434038 + 197434039.

It is an arithmetic number, because the mean of its divisors is an integer number (197434039).

Almost surely, 2^394868077 is an apocalyptic number.

It is an amenable number.

394868077 is a deficient number, since it is larger than the sum of its proper divisors (1).

394868077 is an equidigital number, since it uses as much as digits as its factorization.

394868077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The square root of 394868077 is about 19871.2877539429. The cubic root of 394868077 is about 733.6416994922.

The spelling of 394868077 in words is "three hundred ninety-four million, eight hundred sixty-eight thousand, seventy-seven".