394696189 has 2 divisors, whose sum is σ = 394696190. Its totient is φ = 394696188.

The previous prime is 394696163. The next prime is 394696193. The reversal of 394696189 is 981696493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221563225 + 173132964 = 14885^2 + 13158^2 .

It is a cyclic number.

It is not a de Polignac number, because 394696189 - 2⁹ = 394695677 is a prime.

It is a super-3 number, since 3×394696189³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394696109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197348094 + 197348095.

It is an arithmetic number, because the mean of its divisors is an integer number (197348095).

Almost surely, 2^394696189 is an apocalyptic number.

It is an amenable number.

394696189 is a deficient number, since it is larger than the sum of its proper divisors (1).

394696189 is an equidigital number, since it uses as much as digits as its factorization.

394696189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 55.

The square root of 394696189 is about 19866.9622489197. The cubic root of 394696189 is about 733.5352314386.

The spelling of 394696189 in words is "three hundred ninety-four million, six hundred ninety-six thousand, one hundred eighty-nine".