394476687373 has 2 divisors, whose sum is σ = 394476687374. Its totient is φ = 394476687372.

The previous prime is 394476687313. The next prime is 394476687389. The reversal of 394476687373 is 373786674493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215164244164 + 179312443209 = 463858^2 + 423453^2 .

It is an emirp because it is prime and its reverse (373786674493) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394476687373 is a prime.

It is a super-2 number, since 2×394476687373² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 394476687299 and 394476687308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394476687313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197238343686 + 197238343687.

It is an arithmetic number, because the mean of its divisors is an integer number (197238343687).

Almost surely, 2^394476687373 is an apocalyptic number.

It is an amenable number.

394476687373 is a deficient number, since it is larger than the sum of its proper divisors (1).

394476687373 is an equidigital number, since it uses as much as digits as its factorization.

394476687373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384072192, while the sum is 67.

The spelling of 394476687373 in words is "three hundred ninety-four billion, four hundred seventy-six million, six hundred eighty-seven thousand, three hundred seventy-three".