394668700879 has 2 divisors, whose sum is σ = 394668700880. Its totient is φ = 394668700878.

The previous prime is 394668700873. The next prime is 394668700897. The reversal of 394668700879 is 978007866493.

Together with next prime (394668700897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394668700879 - 2²⁹ = 394131829967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394668700873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197334350439 + 197334350440.

It is an arithmetic number, because the mean of its divisors is an integer number (197334350440).

Almost surely, 2^394668700879 is an apocalyptic number.

394668700879 is a deficient number, since it is larger than the sum of its proper divisors (1).

394668700879 is an equidigital number, since it uses as much as digits as its factorization.

394668700879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109734912, while the sum is 67.

The spelling of 394668700879 in words is "three hundred ninety-four billion, six hundred sixty-eight million, seven hundred thousand, eight hundred seventy-nine".