394668700873 has 2 divisors, whose sum is σ = 394668700874. Its totient is φ = 394668700872.

The previous prime is 394668700831. The next prime is 394668700879. The reversal of 394668700873 is 378007866493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350781383824 + 43887317049 = 592268^2 + 209493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394668700873 is a prime.

It is not a weakly prime, because it can be changed into another prime (394668700879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197334350436 + 197334350437.

It is an arithmetic number, because the mean of its divisors is an integer number (197334350437).

Almost surely, 2^394668700873 is an apocalyptic number.

It is an amenable number.

394668700873 is a deficient number, since it is larger than the sum of its proper divisors (1).

394668700873 is an equidigital number, since it uses as much as digits as its factorization.

394668700873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36578304, while the sum is 61.

The spelling of 394668700873 in words is "three hundred ninety-four billion, six hundred sixty-eight million, seven hundred thousand, eight hundred seventy-three".