394658397967 has 2 divisors, whose sum is σ = 394658397968. Its totient is φ = 394658397966.

The previous prime is 394658397949. The next prime is 394658397971. The reversal of 394658397967 is 769793856493.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394658397967 - 2¹¹ = 394658395919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 394658397893 and 394658397902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394658397937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197329198983 + 197329198984.

It is an arithmetic number, because the mean of its divisors is an integer number (197329198984).

Almost surely, 2^394658397967 is an apocalyptic number.

394658397967 is a deficient number, since it is larger than the sum of its proper divisors (1).

394658397967 is an equidigital number, since it uses as much as digits as its factorization.

394658397967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1851776640, while the sum is 76.

The spelling of 394658397967 in words is "three hundred ninety-four billion, six hundred fifty-eight million, three hundred ninety-seven thousand, nine hundred sixty-seven".