394518601 has 2 divisors, whose sum is σ = 394518602. Its totient is φ = 394518600.

The previous prime is 394518599. The next prime is 394518623. The reversal of 394518601 is 106815493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296528400 + 97990201 = 17220^2 + 9899^2 .

It is an emirp because it is prime and its reverse (106815493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394518601 - 2¹ = 394518599 is a prime.

Together with 394518599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (394518101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197259300 + 197259301.

It is an arithmetic number, because the mean of its divisors is an integer number (197259301).

Almost surely, 2^394518601 is an apocalyptic number.

It is an amenable number.

394518601 is a deficient number, since it is larger than the sum of its proper divisors (1).

394518601 is an equidigital number, since it uses as much as digits as its factorization.

394518601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 394518601 is about 19862.4923159205. The cubic root of 394518601 is about 733.4252003138.

The spelling of 394518601 in words is "three hundred ninety-four million, five hundred eighteen thousand, six hundred one".