394879384667 has 2 divisors, whose sum is σ = 394879384668. Its totient is φ = 394879384666.

The previous prime is 394879384661. The next prime is 394879384687. The reversal of 394879384667 is 766483978493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394879384667 - 2⁴ = 394879384651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 394879384594 and 394879384603.

It is not a weakly prime, because it can be changed into another prime (394879384661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197439692333 + 197439692334.

It is an arithmetic number, because the mean of its divisors is an integer number (197439692334).

Almost surely, 2^394879384667 is an apocalyptic number.

394879384667 is a deficient number, since it is larger than the sum of its proper divisors (1).

394879384667 is an equidigital number, since it uses as much as digits as its factorization.

394879384667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1316818944, while the sum is 74.

The spelling of 394879384667 in words is "three hundred ninety-four billion, eight hundred seventy-nine million, three hundred eighty-four thousand, six hundred sixty-seven".